List of critically endangered plants

As of December 2023, the International Union for Conservation of Nature (IUCN) lists 5702 plant species categorized as Critically Endangered, including 569 which are tagged as possibly extinct and 48 possibly extinct in the wild.^[1]^[2] 8.6% of all evaluated plant species are listed as critically endangered. The IUCN also lists 284 subspecies and varieties as critically endangered.

Extinct in the wild (EW): 45 species
Critically endangered (CR): 5,702 species
Endangered (EN): 10,901 species
Vulnerable (VU): 9,673 species
Near threatened (NT, LR/cd): 4,160 species
Least concern (LC): 30,554 species
Data deficient (DD): 5,371 species

Plant species (IUCN, 2023-1)

66,406 extant species have been evaluated
61,035 of those are fully assessed^[a]
34,588 are not threatened at present^[b]
26,276 are threatened^[c]
174 are extinct or extinct in the wild:
- 129 extinct (EX) species^[d]
- 45 extinct in the wild (EW)
- 569 possibly extinct [CR(PE)]
- 48 possibly extinct in the wild [CR(PEW)]

excludes data deficient evaluations.
NT, LR/cd, LC.
Threatened comprises CR, EN and VU.
Chart omits extinct (EX) species

Additionally 5371 plant species (8.1% of those evaluated) are listed as data deficient, meaning there is insufficient information for a full assessment of conservation status. As these species typically have small distributions and/or populations, they are intrinsically likely to be threatened, according to the IUCN.^[3] While the category of data deficient indicates that no assessment of extinction risk has been made for the taxa, the IUCN notes that it may be appropriate to give them "the same degree of attention as threatened taxa, at least until their status can be assessed."^[4]

This is a complete list of critically endangered plant species, subspecies and varieties evaluated by the IUCN. Species considered possibly extinct by the IUCN are marked as such.

Galaxaura barbata (possibly extinct)
Gracilaria skottsbergii
Laurencia oppositocladia
Myriogramme kylinii
Phycodrina elegans (possibly extinct)
Schizymenia ecuadoreana

There are 23 bryophyte species assessed as critically endangered.

Mosses

Liverworts

Bazzania bhutanica
Bryopteris gaudichaudii
Drepanolejeunea senticosa
Geothallus tuberosus
Kurzia sinensis
Myriocolea irrorata
Phycolepidozia exigua
Schistochila undulatifolia
Sphaerolejeunea umbilicata, synonym of Lejeunea drehwaldii
Spruceanthus theobromae
Vandiemenia ratkowskiana

There are 67 species and three varieties of pteridophyte assessed as critically endangered.

Leptosporangiate ferns

There are 54 species and three varieties in the class Polypodiopsida assessed as critically endangered.

Polypodiales

There are 49 species and three varieties in the order Polypodiales assessed as critically endangered.

Aspleniaceae

Asplenium complanatum
Asplenium daghestanicum, Dagestanian spleenwort
Asplenium dielerectum, Asplenium-diellia
Asplenium dielfalcatum
Asplenium diellaciniatum
Asplenium dielmannii
Asplenium dielpallidum
Asplenium haughtonii, Barn fern
Asplenium schizotrichum
Asplenium unisorum

Dryopteridaceae

Species

Ctenitis pallatangana (possibly extinct)
Ctenitis squamigera, Pacific lacefern
Dryopteris cognata, Large kidney fern
Elaphoglossum actinolepis
Elaphoglossum angamarcanum
Elaphoglossum bonapartii
Elaphoglossum chodatii
Elaphoglossum christii
Elaphoglossum cladotrichium
Elaphoglossum corazonense
Elaphoglossum dimorphum, Toothed tongue-fern
Elaphoglossum gossypinum
Elaphoglossum gracilipes (possibly extinct)
Elaphoglossum jamesonii
Elaphoglossum longissimum
Elaphoglossum nervosum, Veined tongue-fern
Elaphoglossum pellucidum
Elaphoglossum polytrichum (possibly extinct)
Elaphoglossum pteropodum
Elaphoglossum sodiroi
Elaphoglossum sprucei
Elaphoglossum trichophorum
Lastreopsis subrecedens
Polystichum drepanum, Madeira shield-fern

Varieties

Dryopteris crinalis var. podosorus
Dryopteris glabra var. flynnii
Dryopteris glabra var. pusilla

Polypodiaceae

Platycerium grande, Giant Staghorn Fern

Other Polypodiales species

Adenophorus periens (possibly extinct)
Anogramma ascensionis, Ascension Island parsley fern
Athyrium rondoense
Blotiella coriacea (possibly extinct)
Cystoathyrium chinense
Diplazium molokaiense
Diplazium ulugurense (possibly extinct)
Doryopteris angelica
Melpomene brevipes (possibly extinct)
Polypodium abitaguae
Pteris adscensionis
Pteris lidgatei
Sadleria wagneriana
Thelypteris bonapartii
Xiphopteris ascensionensis

Hymenophyllales

Salviniales

Marsilea fadeniana

Isoetopsida

Isoetes dispora
Isoetes heldreichii, Pindus quillwort (possibly extinct)
Isoetes hewitsonii
Isoetes malinverniana, Piedmont quillwort
Isoetes nigroreticulata
Isoetes olympica, Olympic quillwort
Isoetes sinensis (possibly extinct)
Isoetes stephansenii
Isoetes taiwanensis
Isoetes wormaldii

Other pteridophyte species

There are 81 species, five subspecies, and 13 varieties of gymnosperm assessed as critically endangered.

Cycads

Species

Ceratozamia euryphyllidia
Ceratozamia fuscoviridis
Ceratozamia huastecorum
Ceratozamia kuesteriana
Ceratozamia miqueliana
Ceratozamia zaragozae
Ceratozamia zoquorum
Cycas annaikalensis
Cycas chamaoensis
Cycas curranii, Curran's pitogo
Cycas debaoensis
Cycas fugax (possibly extinct)
Cycas hongheensis
Cycas pachypoda
Cycas szechuanensis
Cycas tansachana
Cycas wadei, Wade's pitogo
Cycas zambalensis
Encephalartos aemulans, Ngotshe cycad
Encephalartos cerinus, Waxen cycad (possibly extinct)
Encephalartos cupidus, Blyde river cycad
Encephalartos dolomiticus, Wolkberg cycad
Encephalartos dyerianus, Lillie cycad
Encephalartos equatorialis
Encephalartos heenanii, Heenan's cycad
Encephalartos hirsutus, Venda cycad (possibly extinct)
Encephalartos inopinus, Lydenburg cycad (possibly extinct)
Encephalartos kanga, Mnanasi Pori
Encephalartos laevifolius, Kaapsehoop cycad
Encephalartos latifrons, Albany cycad
Encephalartos middelburgensis, Middelburg cycad
Encephalartos msinganus, Msinga cycad
Encephalartos pterogonus, Toothed-cone cycad
Encephalartos sclavoi, Sclavo's cycad
Encephalartos whitelockii
Microcycas calocoma
Zamia amplifolia
Zamia disodon
Zamia gentryi
Zamia hymenophyllidia
Zamia inermis
Zamia macrochiera
Zamia montana
Zamia monticola
Zamia prasina
Zamia purpurea
Zamia pygmaea
Zamia restrepoi
Zamia spartea
Zamia urep
Zamia vazquezii, Little chamal
Zamia wallisii

Subspecies

Cycas szechuanensis subsp. fairylakea
Cycas szechuanensis subsp. szechuanensis
Encephalartos tegulaneus subsp. powysii

Conifers

Species

Abies beshanzuensis, Baishan fir
Abies nebrodensis, Sicilian fir
Abies numidica, Algerian fir
Abies yuanbaoshanensis, Yuanbaoshan fir
Acmopyle sahniana
Agathis montana, Mount Panié kauri
Araucaria angustifolia, Parana pine
Araucaria nemorosa
Dacrydium guillauminii
Glyptostrobus pensilis, Chinese swamp cypress
Juniperus bermudiana, Bermuda cedar
Juniperus saxicola
Libocedrus chevalieri
Pherosphaera fitzgeraldii
Picea koyamae, Koyama's spruce
Picea neoveitchii, Veitch's spruce
Pinus cernua
Pinus squamata
Pinus torreyana, Torrey pine
Podocarpus costaricensis
Podocarpus decumbens
Podocarpus palawanensis
Podocarpus perrieri (possibly extinct)
Podocarpus urbanii, Blue mountain yacca
Taxus floridana, Florida yew
Torreya taxifolia, Florida nutmeg tree
Widdringtonia cedarbergensis, Clanwilliam cedar
Widdringtonia whytei, Mulanje cedar
Wollemia nobilis, Wollemi pine

Subspecies

Abies delavayi subsp. fansipanensis, Fansipan fir
Pinus torreyana subsp. torreyana^[5]

Varieties

Amentotaxus argotaenia var. brevifolia
Cupressus arizonica var. montana, San Pedro cypress
Cupressus arizonica var. stephensonii, Cuyamaca cypress
Cupressus chengiana var. jiangeensis
Cupressus dupreziana var. atlantica, Atlas cypress
Cupressus dupreziana var. dupreziana
Cupressus goveniana var. abramsiana
Juniperus barbadensis var. barbadensis, Barbados cedar
Juniperus deppeana var. sperryi
Juniperus gracilior var. ekmanii
Picea asperata var. ponderosa
Pinus massoniana var. hainanensis
Podocarpus sellowii var. angustifolius

There are 1895 species, 78 subspecies, and 49 varieties of dicotyledon assessed as critically endangered.

Piperales

Piperaceae

Species

Varieties

Piper amalago var. variifolium

Campanulales

There are 62 species and 12 subspecies in Campanulales assessed as critically endangered.

Campanulaceae

Species

Brighamia insignis
Brighamia rockii
Burmeistera asplundii
Burmeistera rubrosepala
Campanula aghrica, Aghrian bellflower
Campanula kantschavelii, Kanchaveli's bellflower
Campanula lazica, Lazian campanula
Campanula seraglio, Serail bellflower
Campanula troegerae
Centropogon albostellatus
Centropogon brachysiphoniatus (possibly extinct)
Centropogon cazaletii
Centropogon pilalensis
Centropogon solisii
Centropogon uncinatus
Clermontia peleana
Clermontia pyrularia, Pear clermontia
Cyanea acuminata, Honolulu cyanea
Cyanea asarifolia
Cyanea asplenifolia
Cyanea calycina
Cyanea crispa
Cyanea dunbariae
Cyanea gibsonii
Cyanea glabra
Cyanea grimesiana
Cyanea hamatiflora
Cyanea horrida
Cyanea humboldtiana
Cyanea kolekoleensis (possibly extinct)
Cyanea konahuanuiensis
Cyanea kuhihewa
Cyanea lobata
Cyanea longiflora
Cyanea magnicalyx
Cyanea mannii
Cyanea marksii, Mark's cyanea
Cyanea mceldowneyi
Cyanea platyphylla
Cyanea procera, Haha
Cyanea remyi
Cyanea rivularis
Cyanea shipmanii
Cyanea stictophylla
Cyanea st.-johnii, St John's rollandia
Cyanea truncata, Punaluu cyanea
Cyanea undulata
Delissea kauaiensis
Delissea rhytidosperma (possibly extinct in the wild)
Delissea takeuchii (possibly extinct)
Delissea waianaeensis
Lobelia gaudichaudii
Lobelia koolauensis
Lobelia monostachya
Lobelia oahuensis
Muehlbergella oweriniana, Owerin's muchlenbergella
Sclerotheca viridiflora
Siphocampylus loxensis (possibly extinct)
Siphocampylus uncipes
Trematolobelia singularis
Wahlenbergia linifolia, Large bellflower
Wahlenbergia malaissei

Subspecies

Clermontia oblongifolia subsp. brevipes, Oahu clermontia
Clermontia oblongifolia subsp. mauiensis
Clermontia peleana subsp. peleana
Clermontia peleana subsp. singuliflora
Clermontia samuelii subsp. hanaensis
Clermontia samuelii subsp. samuelii
Cyanea grimesiana subsp. grimesiana
Cyanea grimesiana subsp. obatae
Cyanea hamatiflora subsp. carlsonii
Cyanea hamatiflora subsp. hamatiflora
Cyanea lobata subsp. baldwinii
Cyanea lobata subsp. lobata

Goodeniaceae

Scaevola socotraensis

Aristolochiales

Aristolochia utriformis
Aristolochia westlandii
Asarum gusk
Asarum monodoriflorum
Asarum okinawense
Asarum pellucidum
Asarum tabatanum
Pararistolochia preussii, synonym of Aristolochia preussii

Theales

There are 295 species and 23 subspecies in Theales assessed as critically endangered.

Dipterocarpaceae

Species

Anisoptera curtisii
Anisoptera megistocarpa
Anisoptera reticulata
Cotylelobium lewisianum
Cotylelobium scabriusculum
Dipterocarpus applanatus
Dipterocarpus baudii
Dipterocarpus bourdilloni
Dipterocarpus chartaceus
Dipterocarpus concavus
Dipterocarpus coriaceus
Dipterocarpus cornutus
Dipterocarpus costulatus
Dipterocarpus cuspidatus
Dipterocarpus dyeri
Dipterocarpus elongatus
Dipterocarpus eurynchus
Dipterocarpus fagineus
Dipterocarpus fusiformis
Dipterocarpus glabrigemmatus
Dipterocarpus glandulosus
Dipterocarpus globosus
Dipterocarpus gracilis
Dipterocarpus grandiflorus (possibly extinct)
Dipterocarpus hasseltii
Dipterocarpus hispidus
Dipterocarpus insignis
Dipterocarpus kerrii
Dipterocarpus kunstleri
Dipterocarpus lamellatus
Dipterocarpus littoralis
Dipterocarpus lowii
Dipterocarpus perakensis
Dipterocarpus rigidus
Dipterocarpus rotundifolius
Dipterocarpus semivestitus
Dipterocarpus tempehes
Dipterocarpus turbinatus
Dipterocarpus validus
Dryobalanops fusca
Dryobalanops keithii
Hopea acuminata
Hopea aequalis
Hopea apiculata
Hopea bancana
Hopea basilanica
Hopea beccariana
Hopea bilitonensis
Hopea brachyptera
Hopea brevipetiolaris
Hopea cagayanensis
Hopea chinensis
Hopea cordata
Hopea coriacea
Hopea depressinerva
Hopea enicosanthoides
Hopea erosa
Hopea ferruginea
Hopea glaucescens
Hopea hainanensis
Hopea helferi
Hopea hongayanensis
Hopea inexpectata
Hopea jacobi
Hopea johorensis
Hopea kerangasensis
Hopea latifolia
Hopea malibato
Hopea mengerawan
Hopea micrantha
Hopea mindanensis
Hopea mollissima
Hopea montana
Hopea nervosa
Hopea nigra
Hopea nutans
Hopea ovoidea
Hopea pentanervia
Hopea philippinensis
Hopea plagata
Hopea polyalthioides
Hopea pubescens
Hopea quisumbingiana
Hopea samarensis
Hopea sangal
Hopea sphaerocarpa
Hopea subalata
Hopea wyattsmithii
Parashorea aptera
Parashorea lucida
Parashorea malaanonan
Parashorea stellata
Shorea acuminata
Shorea acuminatissima
Shorea acuta
Shorea almon
Shorea asahii
Shorea astylosa
Shorea bakoensis
Shorea balangeran
Shorea blumutensis
Shorea bullata
Shorea carapae
Shorea chaiana
Shorea collina
Shorea congestiflora
Shorea conica
Shorea contorta
Shorea cordata
Shorea cordifolia
Shorea dealbata
Shorea dispar (possibly extinct)
Shorea elliptica
Shorea falcata
Shorea falciferoides
Shorea farinosa
Shorea flaviflora
Shorea flemmichii
Shorea foraminifera
Shorea foxworthyi
Shorea gardneri
Shorea geniculata
Shorea gibbosa
Shorea guiso, Red balau
Shorea hopeifolia
Shorea hypochra
Shorea hypoleuca
Shorea iliasii
Shorea inaequilateralis
Shorea inappendiculata
Shorea induplicata
Shorea isoptera
Shorea johorensis
Shorea kuantanensis
Shorea kudatensis
Shorea kunstleri
Shorea ladiana
Shorea lamellata
Shorea laxa
Shorea lepidota
Shorea leptoderma
Shorea lissophylla
Shorea longiflora
Shorea longisperma
Shorea lumutensis
Shorea lunduensis
Shorea macrantha
Shorea macrobalanos
Shorea malibato
Shorea materialis
Shorea megistophylla
Shorea micans
Shorea montigena
Shorea mujongensis
Shorea myrionerva
Shorea negrosensis
Shorea oblongifolia
Shorea obovoidea
Shorea ochrophloia
Shorea ovalifolia
Shorea pachyphylla
Shorea palembanica
Shorea pallescens
Shorea pallidifolia
Shorea palosapis
Shorea peltata
Shorea platycarpa
Shorea polyandra
Shorea polysperma
Shorea praestans
Shorea pubistyla
Shorea resinosa
Shorea revoluta
Shorea rotundifolia
Shorea rubella
Shorea rugosa
Shorea sagittata
Shorea selanica
Shorea seminis
Shorea slootenii
Shorea smithiana
Shorea stipularis
Shorea subcylindrica
Shorea sumatrana
Shorea superba
Shorea symingtonii
Shorea tenuiramulosa
Shorea thorelii
Shorea trapezifolia
Shorea waltoni
Shorea xanthophylla
Shorea zeylanica
Stemonoporus affinis
Stemonoporus canaliculatus
Stemonoporus elegans
Stemonoporus gilimalensis
Stemonoporus gracilis
Stemonoporus lanceolatus
Stemonoporus lancifolius
Stemonoporus latisepalus
Stemonoporus marginalis
Stemonoporus moonii
Stemonoporus nitidus
Stemonoporus petiolaris
Vateria indica
Vateria macrocarpa
Vateriopsis seychellarum
Vatica affinis
Vatica bella
Vatica brevipes
Vatica cauliflora
Vatica chartacea
Vatica chinensis
Vatica compressa
Vatica congesta
Vatica coriacea
Vatica cuspidata
Vatica diospyroides
Vatica elliptica
Vatica flavida
Vatica flavovirens
Vatica globosa
Vatica guangxiensis
Vatica havilandii
Vatica hullettii
Vatica lanceifolia
Vatica lobata
Vatica maingayi
Vatica obovata
Vatica pachyphylla
Vatica parvifolia
Vatica pentandra
Vatica rhynchocarpa
Vatica ridleyana
Vatica rotata
Vatica sarawakensis
Vatica scortechinii
Vatica soepadmoi
Vatica teysmanniana
Vatica venulosa
Vatica xishuangbannaensis (possibly extinct)

Subspecies

Anisoptera thurifera subsp. thurifera
Dipterocarpus caudatus subsp. caudatus
Dipterocarpus conformis subsp. conformis
Hopea andersonii subsp. basalticola
Hopea jucunda subsp. jucunda
Hopea jucunda subsp. modesta
Shorea assamica subsp. assamica
Shorea assamica subsp. globifera
Shorea assamica subsp. koordersii
Shorea assamica subsp. philippinensis
Shorea falciferoides subsp. falciferoides
Shorea falciferoides subsp. glaucescens
Shorea hemsleyana subsp. grandiflora
Shorea hemsleyana subsp. hemsleyana
Shorea macroptera subsp. macroptera
Shorea macroptera subsp. sandakanensis
Shorea ovalis subsp. sarawakensis
Shorea ovalis subsp. sericea
Shorea singkawang subsp. scabrosa
Vatica javanica subsp. javanica
Vatica javanica subsp. scaphifolia
Vatica oblongifolia subsp. crassilobata
Vatica oblongifolia subsp. elliptifolia

Malvales

Species

Abutilon eremitopetalum, Hidden-petaled abutilon
Abutilon menziesii
Abutilon sandwicense, Greenflower Indian mallow
Byttneria minytricha
Carpodiptera mirabilis
Cola cecidiifolia
Cola metallica
Cola nigerica
Cola praeacuta
Craigia kwangsiensis
Dicellostyles axillaris
Dombeya acutangula
Dombeya ledermannii
Elaeocarpus bojeri
Elaeocarpus gaussenii
Elaeocarpus integrifolius
Hampea thespesioides
Herrania laciniifolia
Hibiscadelphus distans
Hibiscadelphus giffardianus
Hibiscadelphus hualalaiensis
Hibiscus clayi, Clay's hibiscus
Hibiscus fragilis
Hildegardia populifolia
Kokia drynarioides, Hawaiian tree cotton
Kokia kauaiensis, Kauai koki'o
Leptolaena delphinensis
Leptolaena masoalensis
Leptolaena raymondii
Perrierodendron quartzitorum
Pterospermum kingtungense
Pterospermum menglunense
Pterospermum yunnanense
Quararibea jefensis
Quararibea santaritensis
Quararibea yunckeri
Reevesia rotundifolia
Sarcolaena grandiflora
Sarcolaena humbertiana
Sarcolaena isaloensis
Sloanea shankii
Trochetiopsis ebenus, Dwarf ebony
Wercklea flavovirens

Subspecies

Elaeocarpus submonoceras subsp. oliganthus
Hibiscus waimeae subsp. hannerae

Varieties

Bombax insigne var. polystemon

Geraniales

Erodium astragaloides
Erodium hendrikii, Heron's bill
Erodium sosnowskianum, Sosonovskiy's heron's-bill
Geranium antisanae
Geranium arboreum
Geranium kauaiense
Geranium maderense
Impatiens adenioides
Impatiens angustisepala
Impatiens bururiensis
Impatiens gordonii, Seychelles bizzie lizzie
Impatiens grandisepala
Oxalis natans
Oxalis norlindiana
Oxalis uliginosa
Pelargonium cotyledonis, Old father live forever
Pelargonium insularis
Tropaeolum umbellatum

Lecythidales

Species

Subspecies

Eschweilera piresii subsp. viridipetala

Polygalales

Species

Malpighia proctorii
Polygala helenae
Polygala quitensis (possibly extinct)
Polygala sinisica
Pteromonnina fosbergii
Stigmaphyllon nudiflorum
Triaspis schliebenii (possibly extinct)
Vochysia aurifera

Subspecies

Byrsonima nemoralis subsp. dressleri

Santalales

Species

Agelanthus rondensis (possibly extinct)
Dendropemon caymanensis
Exocarpos luteolus
Kunkeliella psilotoclada (possibly extinct)
Kunkeliella subsucculenta
Olax psittacorum
Phoradendron aequatoris
Taxillus wiensii

Varieties

Proteales

Family Proteaceae - 103 species

Adenanthos detmoldii
Adenanthos dobagii
Banksia anatona
Banksia aurantia
Banksia brownii
Banksia cuneata
Banksia fuscobractea
Banksia montana
Banksia prionophylla
Banksia rosserae
Banksia verticillata
Banksia vincentia
Diastella buekii
Diastella parilis
Eidothea hardeniana
Faurea lucida
Grevillea angustiloba
Grevillea asparagoides
Grevillea asteriscosa
Grevillea caleyi
Grevillea calliantha
Grevillea curviloba
Grevillea divaricata (possibly extinct)
Grevillea eriobotrya
Grevillea fuscolutea
Grevillea humifusa
Grevillea iaspicula
Grevillea incurva
Grevillea involucrata
Grevillea lullfitzii
Grevillea maccutcheonii
Grevillea marriottii
Grevillea maxwellii
Grevillea obtusifolia
Grevillea pinifolia
Grevillea pythara
Grevillea rara
Grevillea rosieri
Grevillea scapigera
Grevillea scortechinii
Grevillea squiresiae
Grevillea tenuiloba
Grevillea wilkinsonii
Hakea aenigma
Hakea ilicifolia
Hakea pulvinifera
Helicia peekelii
Helicia peltata
Helicia retusa
Isopogon fletcheri
Isopogon robustus
Isopogon uncinatus
Lambertia fairallii
Leucadendron bonum
Leucadendron chamelaea
Leucadendron flexuosum
Leucadendron globosum
Leucadendron immoderatum
Leucadendron levisanus
Leucadendron macowanii
Leucadendron tradouwense
Leucadendron verticillatum
Leucospermum arenarium
Leucospermum fulgens
Leucospermum harpagonatum
Mimetes stokoei
Panopsis hernandezii
Panopsis magnifructa
Persoonia acerosa
Persoonia arborea
Persoonia bargoensis
Persoonia brevirhachis
Persoonia flexifolia
Persoonia micranthera
Persoonia pauciflora
Persoonia pungens
Persoonia rufiflora
Persoonia saccata
Persoonia striata
Persoonia stricta
Persoonia trinervis
Protea holosericea
Protea inopina
Protea namaquana
Protea nubigena
Protea odorata
Roupala tobagensis
Serruria aemula
Serruria flava
Serruria florida
Serruria furcellata
Serruria lacunosa
Serruria pinnata
Serruria scoparia
Serruria trilopha
Sorocephalus crassifolius
Sorocephalus imbricatus
Sorocephalus palustris
Sorocephalus scabridus
Synaphea nexosa
Synaphea odocoileops
Synaphea quartzitica
Synaphea stenoloba

Family Sabiaceae - 5 species

Meliosma caucana
Meliosma lindae
Meliosma nanarum
Meliosma nesites
Meliosma seleriana

Dipsacales

Centranthus amazonum
Cephalaria anatolica, Anatolian cephalaria
Lonicera karataviensis
Nardostachys jatamansi
Valeriana leschenaultii
Viburnum divaricatum (possibly extinct)
Viburnum hondurense
Viburnum molinae
Viburnum subpubescens

Plumbaginales

Armeria berlengensis
Armeria helodes
Limonium calabrum
Limonium dendroides
Limonium sibthorpianum
Limonium spectabile
Limonium sventenii

Rubiales

Species

Arachnothryx chimboracensis
Belonophora ongensis
Chassalia capitata
Chassalia laikomensis
Coprosma laevigata, Rarotongan coprosma
Diplospora erythrospora
Exostema orbiculatum
Gaertnera hirtiflora
Gaertnera longifolia
Gaertnera truncata
Gardenia anapetes
Gardenia brighamii, Hawaiian gardenia
Gardenia candida
Gardenia mannii, Mann's gardenia
Gardenia vitiensis
Gonzalagunia bifida
Gonzalagunia dodsonii
Gonzalagunia mollis
Guettarda longiflora
Hymenodictyon seyrigii (possibly extinct)
Ixora johnsonii
Kadua coriacea
Kadua degeneri
Kadua flynnii
Kadua haupuensis (possibly extinct in the wild)
Kadua laxiflora
Kadua parvula
Kadua st-johnii
Keetia bakossii
Ladenbergia rubiginosa
Lasianthus rhinophyllus
Machaonia woodburyana
Manettia canescens (possibly extinct)
Manettia holwayi (possibly extinct)
Manettia nebulosa
Nauclea gageana
Nesohedyotis arborea, St Helena dogwood
Oxyanthus okuensis
Pavetta kupensis
Pavetta rubentifolia
Pentagonia orthoneura (possibly extinct)
Pentagonia peruviana
Portlandia albiflora
Prismatomeris andamanica
Psathura sechellarum
Psychotria bimbiensis
Psychotria bryonicola
Psychotria danceri
Psychotria grantii
Psychotria hanoverensis
Psychotria minimicalyx
Psychotria moliwensis
Psychotria moseskemei
Psychotria silhouettae
Psychotria sodiroi
Psychotria speciosa
Psychotria tahitensis
Psychotria trichocalyx
Psychotria whistleri, Rarotonga psychotria
Ramosmania rodriguesi
Rondeletia anguillensis
Rondeletia buxifolia, Pribby
Rondeletia cincta
Rothmannia annae, Wright's gardenia
Simira standleyi
Stelechantha arcuata
Stenostomum tomentosum
Tarenna hutchinsonii
Timonius jambosella
Tinadendron noumeanum
Wendlandia andamanica

Subspecies

Ixora scheffleri subsp. keniensis
Kadua cordata subsp. remyi
Kadua degeneri subsp. coprosmifolia
Kadua degeneri subsp. degeneri

Varieties

Chassalia coriacea var. johnstonii
Coprosma rapensis var. benefica, Red berry

Violales

Species

Banara caymanensis
Banara vanderbiltii
Casearia mauritiana
Casearia staffordiae
Casearia williamsiana
Frankenia portulacifolia, St Helena tea plant
Gloeospermum boreale
Helianthemum bystropogophyllum
Helianthemum teneriffae
Hoplestigma pierreanum
Isodendrion laurifolium
Isodendrion pyrifolium
Nasa ferox
Rinorea marginata
Rinorea maximiliani
Viola amamiana
Viola helenae
Viola hispida
Viola ucriana
Viola utchinensis
Xylosma capillipes
Xylosma crenata
Xylosma pachyphylla, Spiny logwood
Xylosma peltata
Xylosma pininsularis
Xylosma serrata (possibly extinct)

Subspecies

Cistus heterophyllus subsp. carthaginensis
Viola chamissoniana subsp. chamissoniana

Euphorbiales

There are 74 species, two subspecies, and ten varieties in Euphorbiales assessed as critically endangered.

Peraceae

Chaetocarpus pubescens

Buxaceae

Buxus vahlii, Vahl's boxwood

Euphorbiaceae

Species

Acalypha ecuadorica
Acalypha eggersii
Acalypha raivavensis
Agrostistachys hookeri
Amanoa anomala
Aporosa fusiformis
Aristogeitonia gabonica
Claoxylon linostachys
Cleidion lemurum
Cleistanthus major
Cleistanthus robustus
Croton lawianus
Croton macrocarpus
Croton vaughanii
Crotonogyne impedita
Ditaxis macrantha
Drypetes riseleyi
Drypetes tessmanniana
Euphorbia alcicornis (possibly extinct)
Euphorbia ankazobensis
Euphorbia berorohae
Euphorbia boinensis (possibly extinct)
Euphorbia capmanambatoensis
Euphorbia cap-saintemariensis
Euphorbia deppeana
Euphorbia eleanoriae
Euphorbia francoisii
Euphorbia geroldii
Euphorbia halemanui
Euphorbia heleniana, French grass
Euphorbia herbstii
Euphorbia iharanae
Euphorbia kondoi
Euphorbia labatii
Euphorbia margalidiana
Euphorbia millotii
Euphorbia neospinescens (possibly extinct)
Euphorbia origanoides, Ascension spurge
Euphorbia pachypodioides
Euphorbia parvicyathophora
Euphorbia pirahazo (possibly extinct)
Euphorbia quitensis
Euphorbia razafindratsirae
Euphorbia remyi
Euphorbia robivelonae
Euphorbia rockii
Euphorbia stygiana
Euphorbia tanaensis
Euphorbia tulearensis
Flueggea elliptica
Flueggea neowawraea
Glochidion chodoense
Glochidion papenooense
Hieronyma crassistipula
Koilodepas ferrugineum
Macaranga raivavaeensis
Ostodes minor
Paranecepsia andrafiabensis
Phyllanthus caesiifolius
Phyllanthus millei
Phyllanthus nyale
Phyllanthus pindaiensis
Phyllanthus revaughanii
Podadenia thwaitesii
Pseudoglochidion anamalayanum
Sauropus assimilis
Sauropus elegantissimus
Sebastiania crenulata
Sebastiania howardiana
Tetrorchidium microphyllum
Trigonostemon cherrieri
Victorinia regina, synonym of Cnidoscolus regina

Subspecies

Euphorbia cylindrifolia subsp. tuberifera
Euphorbia stenoclada subsp. ambatofinandranae

Varieties

Drypetes usambarica var. rugulosa
Euphorbia decaryi var. robinsonii
Euphorbia francoisii var. francoisii
Euphorbia greenwayi var. greenwayi
Euphorbia lophogona var. tenuicaulis
Euphorbia remyi var. kauaiensis
Euphorbia remyi var. remyi
Phyllanthus aeneus var. papillosus
Sebastiania lesteri var. glabrata
Sebastiania lesteri var. lesteri

Laurales

There are 40 species in the order Laurales assessed as critically endangered.

Monimiaceae

Hernandiaceae

Lauraceae

Actinodaphne cuspidata
Actinodaphne lanata
Aniba pedicellata
Aspidostemon caudatus
Aspidostemon inconspicuus (possibly extinct)
Aspidostemon litoralis
Aspidostemon synandra
Aspidostemon triantherus
Aspidostemon trichandra
Beilschmiedia ambigua
Beilschmiedia penangiana
Beilschmiedia preussii
Cinnamomum kotoense
Cinnamomum rivulorum
Cinnamomum walaiwarense
Cryptocarya elliptifolia
Cryptocarya ferrarsii
Dehaasia acuminata
Dehaasia chatacea
Dehaasia pugerensis
Hexapora curtisii
Litsea scortechinii
Nectandra caudatoacuminata
Nectandra debilis
Nectandra minima
Nectandra pulchra
Ocotea harrisii
Ocotea lancilimba
Ocotea monteverdensis
Ocotea pachypoda
Pleurothyrium roberto-andinoi

Cucurbitales

Species

Begonia asympeltata
Begonia minuta
Begonia montis-elephantis
Begonia salaziensis
Begonia stellata

Subspecies

Begonia quadrialata subsp. dusenii

Ebenales

There are 46 species in Ebenales assessed as critically endangered.

Symplocaceae

Symplocos versicolor

Sapotaceae

Ebenaceae

Diospyros angulata
Diospyros benstonei
Diospyros chrysophyllos
Diospyros crumenata
Diospyros egrettarum
Diospyros hemiteles
Diospyros katendei (possibly extinct)
Diospyros lolinopsis
Diospyros molissima
Diospyros moonii
Diospyros mun
Diospyros nodosa
Diospyros rheophytica
Diospyros vaccinioides, Small persimmon
Diospyros veillonii

Styracaceae

Styrax portoricensis

Celastrales

There are 29 species and two subspecies in the order Celastrales assessed as critically endangered.

Icacinaceae

Grisollea thomassetii
Pennantia baylisiana, Three kings kaikomako
Urandra apicalis

Hollies

Species

Subspecies

Ilex perado subsp. iberica
Ilex perado subsp. lopezlilloi

Celastraceae

Bhesa nitidissima
Bhesa sinica
Cassine koordersii
Euonymus pallidifolia
Maytenus eggersii
Maytenus harrisii
Maytenus manabiensis (possibly extinct)
Maytenus williamsii
Platypterocarpus tanganyikensis
Pristimera biholongii
Pristimera breteleri
Salacia conraui
Salacia villiersii
Simirestis klaineana
Simirestis staudtii
Tontelea hondurensis

Dichapetalaceae

Dichapetalum korupinum
Dichapetalum letouzeyi

Myrtales

There are 97 species and five varieties in the order Myrtales assessed as critically endangered.

Myrtaceae

Species

Calycorectes schottianus
Calyptranthes acutissima
Calyptranthes arenicola
Calyptranthes flavo-viridis
Calyptranthes kiaerskovii
Calyptranthes pozasiana
Calyptranthes uniflora
Eucalyptus recurva, Mongarlowe mallee
Eugenia aboukirensis
Eugenia acutissima
Eugenia albida (possibly extinct)
Eugenia arianae
Eugenia bojeri
Eugenia camptophylla
Eugenia coyolensis
Eugenia crassipetala
Eugenia gageana
Eugenia gilgii
Eugenia guayaquilensis (possibly extinct)
Eugenia hanoverensis
Eugenia hastilis
Eugenia insignis
Eugenia kameruniana
Eugenia kellyana
Eugenia klossii
Eugenia lancetillae
Eugenia polypora
Eugenia rendlei
Eugenia rheophytica
Eugenia scalarinervis
Eugenia scheffleri (possibly extinct)
Eugenia singampattiana
Eugenia sp. 'lepredourii'
Eugenia vaughanii
Eugenia woodburyana
Meteoromyrtus wynaadensis
Metrosideros bartlettii, Bartlett's Rata
Mitranthes macrophylla
Myrcia paganii
Myrcianthes ferreyrae
Myrtus claraensis
Plinia rupestris
Psidium sintenisii
Syzygium ampliflorum
Syzygium andamanicum
Syzygium courtallense
Syzygium cyclophyllum
Syzygium guehoi
Syzygium manii
Syzygium palghatense
Syzygium phaeophyllum
Syzygium phyllyraeoides
Syzygium sylvestre
Syzygium travancoricum
Xanthostemon glaucus

Varieties

Eugenia harrisii var. grandifolia
Myrrhinium atropurpureum var. atropurpureum

Melastomataceae

Adelobotrys panamensis
Astronidium floribundum
Astronidium inflatum
Astronidium kasiense
Astronidium lepidotum
Astronidium pallidiflorum
Astronidium saulae
Blakea granatensis
Clidemia ecuadorensis
Henriettea granularis
Henriettea membranifolia
Lijndenia brenanii (possibly extinct)
Memecylon arnottianum
Memecylon bakossiense
Memecylon buxoides
Memecylon elegantulum
Memecylon gardneri
Memecylon myrtiforme
Memecylon orbiculare
Memecylon rhinophyllum
Memecylon sisparense
Meriania versicolor
Miconia benoistii
Miconia leandroides
Miconia littlei
Miconia longisetosa (possibly extinct)
Miconia scabra (possibly extinct)
Tessmannianthus carinatus
Warneckea cordiformis
Warneckea ngutiensis

Combretaceae

Species

Combretum tenuipetiolatum

Varieties

Terminalia eriostachya var. margaretiae, Black mastic
Terminalia glabrata var. glabrata
Terminalia glabrata var. koariki

Thymelaeaceae

Aquilaria crassna
Aquilaria rostrata
Daphnopsis occulta
Wikstroemia villosa, Hairy wikstroemia

Water caltrops

Trapa colchica, Colchis water-chestnut

Lythraceae

Rotala malabarica
Rotala robynsiana
Sonneratia griffithii
Sonneratia hainanensis, Hainan sonneratia
Tetrataxis salicifolia

Onagraceae

Epilobium numidicum

Sapindales

There are 70 species, three subspecies, and five varieties in the order Sapindales assessed as critically endangered.

Rutaceae

Species

Calodendrum eickii
Citrus taiwanica
Decazyx esparzae
Glycosmis crassifolia
Halfordia papuana
Melicope adscendens
Melicope degeneri
Melicope fatuhivensis
Melicope haupuensis
Melicope knudsenii, Knudsen's melicope
Melicope lydgatei
Melicope mucronulata
Melicope quadrangularis, Four-angled pelea
Melicope reflexa
Melicope stonei
Melicope zahlbruckneri, Zahlbruckner's melicope
Oxanthera undulata
Platydesma rostrata
Ravenia swartziana
Sarcomelicope glauca
Spathelia coccinea
Zanthoxylum heterophyllum

Subspecies

Pilocarpus goudotianus subsp. heterochromus

Varieties

Zanthoxylum dipetalum var. tomentosum

Aceraceae

Species

Acer hainanense
Acer leipoense

Varieties

Acer buergerianum var. formosanum, Taiwan trident maple
Acer oblongum var. membranaceum

Sapindaceae

Species

Varieties

Alectryon macrococcus var. auwahiensis
Alectryon macrococcus var. macrococcus

Zygophyllaceae

Tribulus rajasthanensis
Zygophyllum bucharicum
Zygophyllum darvasicum

Anacardiaceae

Buchanania barberi
Campnosperma seychellarum
Comocladia parvifoliola
Dracontomelon macrocarpum
Mangifera campnospermoides
Micronychia benono
Nothopegia aureo-fulva
Nothopegia castanaefolia
Operculicarya capuronii
Poupartia borbonica
Semecarpus ochracea
Semecarpus pseudo-emarginata
Sorindeia calantha

Meliaceae

Species

Subspecies

Trichilia trifolia subsp. pteleaefolia
Turraea mombassana subsp. schliebenii

Burseraceae

Canarium whitei
Commiphora wightii

Asterales

Species

Achyrocline glandulosa
Achyrocline mollis
Aetheolaena hypoleuca (possibly extinct)
Aetheolaena ledifolia (possibly extinct)
Aetheolaena pichinchensis (possibly extinct)
Andryala crithmifolia
Anisopappus burundiensis (possibly extinct)
Anthemis glaberrima
Argyranthemum winteri
Argyroxiphium kauense, Kau silversword
Artemisia insipida
Artemisia kauaiensis (possibly extinct)
Aster quitensis (possibly extinct)
Baccharis aretioides
Baccharis fusca (possibly extinct)
Bidens simplicifolia
Bidens wiebkei
Bothriocline auriculata
Cadiscus aquaticus
Calendula maritima, Sea marigold
Centaurea akamantis, Akamas centaury
Centaurea caroli-henrici, Karl-henrikh's centaury
Centaurea corensis
Centaurea demirizii, Demiriz's centaury
Centaurea drabifolioides, Whitlow-grass-leaved centaury
Centaurea heldreichii
Centaurea leptophylla, Thin-leaved centaury
Centaurea tamanianiae, Tamanyan's centaury
Centaurea vavilovii, Vavilov's centaury
Centaurodendron dracaenoides
Centaurodendron palmiforme
Cheirolophus crassifolius, Maltese centaury
Cheirolophus duranii
Cheirolophus metlesicsii
Cheirolophus santos-abreui
Cirsium davisianum
Cirsium eliasianum
Commidendrum robustum, Gumwood
Commidendrum rotundifolium, Bastard gumwood
Commidendrum spurium, False gumwood
Cotula myriophylloides (possibly extinct)
Cylindrocline commersonii
Dasphyllum lehmannii
Dendroseris berteroana
Dendroseris gigantea
Dendroseris litoralis
Dendroseris macrantha
Dendroseris macrophylla
Dendroseris marginata
Dendroseris micrantha
Dendroseris neriifolia
Dendroseris pinnata
Dendroseris pruinata
Dendroseris regia
Dicoma pretoriensis (possibly extinct)
Dubautia herbstobatae
Dubautia kalalauensis
Dubautia kenwoodii (possibly extinct)
Dubautia latifolia
Dubautia pauciflorula
Egletes humifusa (possibly extinct)
Elaphandra retroflexa (possibly extinct)
Erigeron adscendens
Faujasiopsis reticulata
Fitchia cordata
Gazania thermalis
Gnaphalium sodiroi
Gutenbergia pubescens
Helichrysum artvinense, Artvinian everlasting
Helichrysum melitense, Maltese everlasting
Hesperomannia arborescens, Lanai hesperomannia
Hesperomannia arbuscula, Maui hesperomannia
Hesperomannia lydgatei, Kauai hesperomannia
Hieracium debile
Hieracium lucidum
Hypochaeris oligocephala
Jacobaea trapezuntina, Trapezuntian groundsel
Jurinea akinfievii, Akinfiev's jurinea
Jurinea fontqueri
Lamyropsis microcephala
Melanthera fauriei
Melanthera kamolensis
Melanthera micrantha
Melanthera tenuifolia
Melanthera waimeaensis
Mikania andrei
Mikania iserniana (possibly extinct)
Mikania jamesonii
Mikania seemannii (possibly extinct)
Mikania stereolepis
Mikania tafallana
Monactis dubia
Monarrhenus salicifolius
Onopordum carduelium
Onopordum nogalesii
Pericallis hadrosoma
Pericallis malvifolia
Pladaroxylon leucadendron, He cabbage tree
Podospermum grossheimii, Grossheimi's salsify
Podospermum idae, Ida's salsify
Psephellus adjaricus, Adjarian psephellus
Psephellus avaricus, Awarian centaury
Psephellus gracillimus
Psiadia cataractae
Pulicaria filaginoides
Remya montgomeryi
Saussurea costus
Scalesia atractyloides
Scalesia divisa
Scalesia gordilloi
Scorzonera ketzkhovelii, Ketskhoveli's salsify
Scorzonera kozlowskyi, Kozlovskiy's salsify
Senecio alboranicus
Senecio lamarckianus
Senecio navugabensis (possibly extinct)
Sonchus araraticus, Araratian sow-thistle
Sonchus erzincanicus
Sonchus gandogeri
Talamancalia putcalensis, synonym of Lomanthus putcalensis
Tanacetum oshanahanii
Tanacetum oxystegium, Sharp-stegium tansy
Tetramolopium rockii
Tragopogon makaschwilii, Makashvilis's goat's beard
Tragopogon otschiaurii, Ochiauri's goat's beard
Verbesina caymanensis
Viguiera media
Wedelia oxylepis
Wilkesia hobdyi, Dwarf iliau

Subspecies

Argyroxiphium sandwicense subsp. sandwicense, Mauna Kea silversword
Bidens campylotheca subsp. pentamera
Bidens campylotheca subsp. waihoiensis
Bidens micrantha subsp. ctenophylla
Dubautia plantaginea subsp. humilis
Dubautia plantaginea subsp. magnifolia
Fitchia cuneata subsp. cuneata
Melanthera micrantha subsp. exigua
Melanthera micrantha subsp. micrantha

Varieties

Bidens hendersonensis var. oenoensis
Pectis caymanensis var. robusta
Scalesia atractyloides var. atractyloides
Scalesia atractyloides var. darwinii
Tetramolopium rockii var. calcisabulorum

Magnoliales

There are 63 species and three subspecies in the order Magnoliales assessed as critically endangered.

Canellaceae

Magnoliaceae

Species

Magnolia calimaensis
Magnolia canandeana
Magnolia cararensis
Magnolia cespedesii
Magnolia chimantensis
Magnolia colombiana
Magnolia coronata
Magnolia crassifolia
Magnolia dixonii (possibly extinct)
Magnolia domingensis
Magnolia ekmanii
Magnolia emarginata (possibly extinct)
Magnolia espinalii
Magnolia fansipanensis
Magnolia faustinomirandae
Magnolia grandis
Magnolia gustavii
Magnolia jardinensis
Magnolia katiorum
Magnolia lacandonica
Magnolia longipedunculata
Magnolia manguillo
Magnolia mayae
Magnolia narinensis
Magnolia ofeliae
Magnolia omeiensis
Magnolia ovoidea
Magnolia pleiocarpa
Magnolia polyhypsophylla
Magnolia sanchez-vegae
Magnolia sinica
Magnolia tiepii
Magnolia vallartensis
Magnolia virolinensis
Magnolia wendtii
Magnolia wolfii (possibly extinct in the wild)
Magnolia zenii

Subspecies

Magnolia cubensis subsp. acunae
Magnolia virginiana subsp. oviedoae

Annonaceae

Species

Subspecies

Artabotrys modestus subsp. modestus

Myristicaceae

Brassicales

There are 30 species and one variety in Capparales assessed as critically endangered.

Capparaceae

Cruciferae

Species

Aethionema retsina
Arabis kennedyae, Troodos rockcress
Biscutella rotgesii
Brassica macrocarpa
Coronopus navasii
Crambe feuillei
Crambe sventenii
Crambe tamadabensis
Crambe wildpretii
Diplotaxis siettiana
Diplotaxis vicentina
Draba ecuadoriana
Draba narmanensis, Narmanian whitlow-grass
Draba violacea
Erucastrum palustre
Erysimum deflexum, Bent treacle mustard
Erysimum kykkoticum
Hornungia angustilimbata, Narrow-limbed hornungia
Lepidium arbuscula
Lepidium orbiculare
Lepidium turczaninowii
Rorippa valdes-bermejoi
Sinapidendron angustifolium
Sinapidendron rupestre
Thlaspi zangezuricum, Zangezurian pennycress

Varieties

Aethionema grandiflorum var. sintenisii, Persian stonecress

Apiales

There are 51 species and two varieties in the order Apiales assessed as critically endangered.

Araliaceae

Species

Aralia rex
Astropanax procumbens
Dendropanax cordifolius
Dendropanax filipes
Dendropanax grandiflorus
Dendropanax grandis
Dendropanax hondurensis
Dendropanax oligodontus
Heptapleurum agamae
Heptapleurum curranii
Heptapleurum heptaphyllum
Heptapleurum kuchingense
Heptapleurum marlipoense
Heptapleurum parvifoliolatum
Merrilliopanax chinensis
Meryta brachypoda
Meryta salicifolia
Oreopanax lehmannii
Oreopanax lempiranus
Osmoxylon mariannense
Plerandra baillonii
Plerandra sp. "letocartiorum"
Plerandra sp. "mackeei"
Plerandra sp. "memaoyaensis"
Plerandra sp. "pouemboutensis"
Polyscias aemiliguineae
Polyscias bisattenuata
Polyscias flynnii
Polyscias gracilis
Polyscias gymnocarpa, Koolau tetraplasandra
Polyscias lionnetii
Polyscias neraudiana
Polyscias paniculata
Polyscias racemosa
Polyscias rodriguesiana
Polyscias tahitensis

Varieties

Polyscias sechellarum var. contracta
Polyscias sechellarum var. curiosae

Umbelliferae

Apium bermejoi
Athamanta cortiana
Bupleurum dianthifolium
Bupleurum elatum
Bupleurum kakiskalae
Bupleurum latissimum
Chaerophyllum karsianum, Karsian chervil
Chaerophyllum posofianum, Posofian chervil
Ferula mervynii, Mervyn's giant fennel
Horstrissea dolinicola
Laserpitium longiradium
Ligusticum huteri
Monizia edulis
Naufraga balearica
Niphogeton sprucei
Sanicula mariversa
Sanicula purpurea

Gentianales

There are 41 species, two subspecies, and one variety in the order Gentianales assessed as critically endangered.

Apocynaceae

Amsonia orientalis, Blue star
Hunteria hexaloba (possibly extinct)
Kibatalia longifolia
Lepinia taitensis
Mandevilla jamesonii
Neisosperma thiollierei, synonym of Ochrosia thiollierei
Ochrosia inventorum
Ochrosia kilaueaensis
Pachypodium eburneum
Pachypodium inopinatum
Prestonia parvifolia
Prestonia schumanniana (possibly extinct)
Rauvolfia sachetiae
Tabernaemontana apoda

Loganiaceae

Species

Geniostoma clavigerum
Labordia cyrtandrae
Labordia helleri
Labordia hosakana
Labordia lorenceana
Labordia triflora
Strychnos tetragona

Varieties

Labordia tinifolia var. wahiawaensis

Asclepiadaceae

Species

Asclepias kamerunensis
Cynanchum densiflorum
Cynanchum serpyllifolium
Cynanchum spruceanum
Cynanchum velutinum
Duvaliandra dioscoridis
Goniostemma punctatum
Matelea ecuadorensis (possibly extinct)
Matelea orthoneura
Matelea sprucei
Metalepis gentryi
Metalepis haughtii
Metastelma anegadense
Neoschumannia kamerunensis
Pentastelma auritum
Utleria salicifolia

Subspecies

Ceropegia decidua subsp. pretoriensis
Pentarrhinum abyssinicum subsp. ijimense

Gentianaceae

Rosales

There are 48 species, two subspecies, and one variety in the order Rosales assessed as critically endangered.

Chrysobalanaceae

Couepia joaquinae
Couepia scottmorii
Dactyladenia dichotoma
Dactyladenia eketensis
Dactyladenia johnstonei
Magnistipula multinervia

Rosaceae

Species

Bencomia brachystachya
Bencomia sphaerocarpa
Cercocarpus traskiae, Catalina mahogany
Crataegus darvasica
Crataegus knorringiana
Crataegus necopinata
Crataegus turcicus, Turkish hawthorn
Pentactina rupicola
Potentilla seidlitziana, Zeidlits' five-fingers
Prunus ernestii
Pyrus browiczii, Brovich's pear
Pyrus gergerana, Gergeranian pear
Pyrus korshinskyi
Pyrus magyarica
Pyrus tadshikistanica
Pyrus voronovii, Voronov's pear
Rosa dolichocarpa, Long-fruited brier
Rubus takhtadjanii, Takhtadjan's blackberry
Sibiraea tianschanica
Sorbus decipiens
Sorbus leptophylla, Thin-leaved whitebeam
Sorbus leyana, Ley's whitebeam
Sorbus maderensis
Sorbus parumlobata
Sorbus wilmottiana, Wilmott's whitebeam

Subspecies

Alchemilla fischeri subsp. camerunensis
Polylepis tomentella subsp. nana

Other Rosales

Species

Aichryson dumosum
Byblis gigantea
Connarus ecuadorensis
Connarus popenoei
Monanthes wildpretii
Pittosporum coriaceum
Pittosporum raivavaeense
Pittosporum tanianum
Pittosporum viridulum
Ribes malvifolium
Ribes sardoum, Sardinian currant
Saxifraga artvinensis, Artvinian rockfoil
Sedum euxinum, Euxinian stonecrop
Weinmannia exigua
Weinmannia tinctoria

Varieties

Geissois ternata var. serrata

Primulales

There are 28 species and one variety in Primulales assessed as critically endangered.

Myrsinaceae

Theophrastaceae

Species

Clavija parvula

Varieties

Jacquinia macrantha var. clarendonensis

Primulaceae

Rhamnales

Species

Auerodendron pauciflorum
Colubrina hondurensis
Colubrina oppositifolia
Gouania meyenii
Gouania vitifolia, Oahu chewstick
Phylica polifolia, St Helena rosemary
Reynosia jamaicensis

Varieties

Cayratia pedata var. glabra

Urticales

Species

Debregeasia ceylanica
Dorstenia bicaudata (possibly extinct)
Ficus angladei
Ficus lateriflora
Maillardia pendula, synonym of Maillardia montana
Neraudia angulata
Neraudia kauaiensis
Neraudia ovata, Big Island ma'oloa
Neraudia sericea
Perebea glabrifolia
Pilea cataractae
Pilea laevicaulis
Pilea pollicaris
Pilea selbyanorum
Pseudolmedia manabiensis
Trilepisium gymnandrum
Ulmus gaussenii
Urera kaalae
Zelkova sicula

Varieties

Neraudia angulata var. angulata
Neraudia angulata var. dentata

Solanales

Species

Bonamia menziesii
Cestrum tipocochense
Convolvulus argyrothamnos
Convolvulus durandoi
Mellissia begonifolia, Boxwood
Nothocestrum breviflorum, Small-flowered nothocestrum
Nothocestrum peltatum
Nymphoides macrospermum
Nymphoides sivarajanii
Solanum dolichorhachis
Solanum drymophilum
Solanum incompletum
Solanum lanuginosum
Solanum lidii
Solanum ovum-fringillae
Solanum semicoalitum (possibly extinct)
Turbina inopinata

Varieties

Ipomoea prismatosyphon var. trifida

Scrophulariales

There are 75 species, two subspecies, and one variety in the order Scrophulariales assessed as critically endangered.

Oleaceae

Chionanthus fluminensis
Chionanthus proctorii
Chionanthus subsessilis
Chionanthus tenuis
Fraxinus americana (white ash or American ash)
Fraxinus hondurensis
Fraxinus pennsylvanica (green ash or red ash)
Jasminum azoricum
Linociera albidiflora

Gesneriaceae

Species

Columnea asteroloma
Columnea manabiana
Columnea poortmannii
Cyrtandra crenata (possibly extinct)
Cyrtandra dentata
Cyrtandra kaulantha, Waikane Valley cyrtandra
Cyrtandra lillianae, Te Manga cyrtandra
Cyrtandra mareensis
Cyrtandra paliku
Cyrtandra polyantha, Niu Valley cyrtandra
Cyrtandra rarotongensis, Rarotonga cyrtandra
Cyrtandra subumbellata
Cyrtandra viridiflora
Diastema incisum
Gasteranthus atratus
Gasteranthus extinctus
Monopyle paniculata
Ornithoboea emarginata
Paraboea albida
Paraboea tarutaoensis
Paraboea uniflora
Primulina modesta
Saintpaulia teitensis
Saintpaulia ulugurensis
Saintpaulia watkinsii
Streptocarpus burttianus
Streptocarpus euanthus
Streptocarpus kimbozanus
Streptocarpus thysanotus

Subspecies

Saintpaulia ionantha subsp. grandifolia
Saintpaulia ionantha subsp. rupicola

Varieties

Gesneria scabra var. fawcettii

Bignoniaceae

Amphitecna spathicalyx
Chodanthus montecillensis
Parmentiera morii
Stereospermum zenkeri (possibly extinct)

Acanthaceae

Asystasia masaiensis
Barleria observatrix
Blepharis refracta
Brachystephanus kupeensis
Brachystephanus schliebenii
Carlowrightia ecuadoriana
Championella sarcorrhiza
Crossandra acutiloba
Crossandra cinnabarina
Dicliptera dodsonii
Dischistocalyx rivularis
Hygrophila madurensis
Isoglossa asystasioides
Justicia callopsoidea
Justicia drummondii
Justicia mkungweensis
Megalochlamys tanaensis
Mellera insignis
Psilanthele eggersii
Sanchezia lampra
Stenandrium carolinae, Caroline's pink

Scrophulariaceae

Agalinis kingsii
Antirrhinum charidemi
Isoplexis chalcantha
Odontites granatensis
Paulownia kawakamii
Scrophularia capillaris, Capillary figwort
Verbascum decursivum, Decurrent mullein
Verbascum transcaucasicum, Transcaucasian speedwell
Veronica allahuekberensis, Allahuekberian speedwell
Veronica oetaea

Other Scrophulariales species

Lamiales

There are 64 species and three varieties in the order Lamiales assessed as critically endangered.

Verbenaceae

Aegiphila caymanensis
Aegiphila glomerata
Callicarpa ampla
Citharexylum quitense
Citharexylum svensonii
Cornutia obovata
Gmelina lignum-vitreum
Holmskioldia gigas
Stachytarpheta svensonii
Tectona philippinensis, Philippine teak
Vitex yaundensis

Labiatae

Species

Cuminia eriantha
Cuminia fernandezia
Hyptis argutifolia
Hyptis diversifolia
Lamium tschorochense, Chorokhian dead nettle
Micromeria glomerata
Phyllostegia electra
Phyllostegia haliakalae
Phyllostegia helleri
Phyllostegia hirsuta
Phyllostegia hispida
Phyllostegia kaalaensis
Phyllostegia kahiliensis (possibly extinct)
Phyllostegia knudsenii (possibly extinct)
Phyllostegia mollis
Phyllostegia parviflora
Phyllostegia renovans
Phyllostegia waimeae
Phyllostegia warshaueri
Phyllostegia wawrana
Plectranthus dissitiflorus
Plectranthus scopulicola (possibly extinct)
Salvia caymanensis
Salvia herbanica
Salvia veneris, Kythrean sage
Scutellaria rhomboidalis, Rhomboid skullcap
Sideritis cystosiphon
Sideritis discolor
Sideritis marmorea
Sideritis serrata
Stachys bayburtensis, Bayburt woundwort
Stachys choruhensis, Choruh woundwort
Stachys sosnowskyi, Sosnowsky's woundwort
Stenogyne bifida (possibly extinct in the wild)
Stenogyne campanulata (possibly extinct in the wild)
Stenogyne kanehoana (possibly extinct in the wild)
Stenogyne kealiae
Teucrium abutiloides

Varieties

Phyllostegia parviflora var. glabriuscula
Phyllostegia parviflora var. lydgatei
Phyllostegia parviflora var. parviflora

Boraginaceae

Amsinckia marginata (possibly extinct)
Cordia leslieae
Echium acanthocarpum
Echium handiense
Gyrocaryum oppositifolium
Nonea karsensis, Karsian nonea
Onosma arcuata, Curved goldendrop
Onosma nigricaulis, Black-stemmed goldendrop
Solenanthus reverchonii
Symphytum savvalense, Savvalian comfrey
Tournefortia obtusiflora (possibly extinct)
Varronia bellonis
Varronia rupicola
Varronia urticacea
Varronia wagnerorum, Wagners' cordia

Nepenthales

Species

Drosera insolita
Drosera katangensis
Nepenthes aristolochioides
Nepenthes attenboroughii, Attenborough's pitcher plant
Nepenthes clipeata
Nepenthes dubia
Nepenthes lavicola
Nepenthes macrophylla
Nepenthes rigidifolia
Nepenthes sumatrana
Nepenthes suratensis
Sarracenia oreophila, Green pitcherplant

Subspecies

Sarracenia rubra subsp. alabamensis

Ranunculales

Species

Aconitum chasmanthum
Anemone maxima
Aquilegia barbaricina, Barbaricina colombine
Aquilegia nuragica, Nuragica columbine
Berberis karkaralensis
Berberis nilghiriensis
Callianthemum kernerianum
Consolida samia
Delphinium caseyi, Casey's larkspur
Delphinium iris, Larkspur
Delphinium munzianum, Larskpur
Odontocarya perforata
Ranunculus aragazi, Aragatsian buttercup
Ranunculus tempskyanus, Buttercup
Ranunculus vermirrhizus, Worm-rooted buttercup
Triclisia macrophylla

Varieties

Cissampelos nigrescens var. cardiophylla

Polygonales

Calligonum calcareum
Calligonum triste
Coccoloba cholutecensis
Coccoloba lindaviana
Coccoloba retirensis
Polygonum caspicum, Caspian knotweed
Polygonum toktogulicum
Rumex tunetanus

Podostemales

Apinagia peruviana
Devillea flagelliformis (possibly extinct)
Dicraeanthus zehnderi
Ledermanniella batangensis
Ledermanniella keayi
Ledermanniella sanagaensis
Saxicolella marginalis
Terniopsis ubonensis
Winklerella dichotoma
Zehnderia microgyna

Fabales

Species

Acacia anegadensis, Pokemeboy
Acacia belairioides
Acacia mathuataensis
Acacia roigii
Aeschynomene ruspoliana (possibly extinct)
Albizia vaughanii
Alistilus magnificus
Ammopiptanthus nanus
Amorpha crenulata, Clusterspike false indigo
Anthonotha leptorrhachis
Astragalus acmophylloides, Sharp-leaved milk vetch
Astragalus bylowae, Bylov's milk vetch
Astragalus cavanillesii
Astragalus daghestanicus, Daghestanian milk vetch
Astragalus eliasianus, Eliasian milk vetch
Astragalus igniarius
Astragalus longivexillatus, Long-flagged milk vetch
Astragalus magnificus, Big astragalus
Astragalus maritimus
Astragalus nigrocalycinus, Black-calyx milk vetch
Astragalus olurensis, Olurian milk vetch
Astragalus schachbuzensis, Shakhbuzian milk vetch
Astragalus schmolliae, Schmoll's milkvetch
Astragalus sinuatus, Whited's milkvetch
Astragalus tatlii, Tatli's milk vetch
Astragalus trabzonicus, Trabzonian milk vetch
Astragalus tremolsianus
Astragalus verrucosus
Bauhinia seminarioi
Brachystegia oblonga
Browneopsis macrofoliolata
Cadia rubra
Caesalpinia kavaiensis
Callerya neocaledonica (possibly extinct)
Canavalia favieri
Canavalia molokaiensis, Molokai jack-bean
Canavalia napaliensis
Canavalia pubescens
Canavalia veillonii (possibly extinct)
Chamaecrista seticrenata
Chamaecrista souzana
Chloroleucon tortum
Chordospartium muritai, Coastal tree broom
Clitoria andrei (possibly extinct)
Coursetia cajamarcana
Crudia bibundina
Cynometra falcata
Cynometra filifera
Cynometra gillmanii
Cytisus aeolicus
Dalbergia intibucana
Dalea sabinalis, Sabinal prairie-clover (possibly extinct)
Delonix tomentosa (possibly extinct)
Dialium travancoricum
Dimorphandra wilsonii
Eligmocarpus cynometroides
Eriosema adamaouense
Erythrina perrieri
Erythrina schliebenii
Erythrina tahitensis
Gleditsia vestita
Gymnocladus assamicus
Hymenostegia talbotii
Indigofera ankaratrensis
Indigofera suarezensis
Inga enterolobioides
Kanaloa kahoolawensis (possibly extinct in the wild)
Kennedia retrorsa
Lathyrus belinensis
Lonchocarpus molinae
Lonchocarpus phaseolifolius
Lonchocarpus sanctuarii
Lonchocarpus trifolius
Lonchocarpus yoroensis
Lotus armeniacus, Armenian bird's foot trefoil
Lotus benoistii
Lotus eremiticus
Lotus kunkelii
Lotus maculatus
Lotus pyranthus
Medicago citrina
Microberlinia bisulcata
Mimosa kitrokala (possibly extinct)
Mimosa mensicola
Mimosa morongii
Monopetalanthus hedinii
Neoharmsia baronii
Newtonia camerunensis
Ormocarpopsis itremoensis
Orphanodendron bernalii
Ostryocarpus zenkerianus
Parkia parrii
Parkinsonia peruviana
Phaseolus lignosus, Bermuda bean
Phaseolus rimbachii
Phylloxylon arenicola
Phylloxylon phillipsonii
Phylloxylon xiphoclada
Plagiosiphon longitubus
Platymiscium albertinae
Platysepalum scaberulum
Rhynchosia ledermannii (possibly extinct)
Serianthes nelsonii
Serianthes rurutensis
Sophora rubriflora
Swartzia oraria
Talbotiella gentii
Teline nervosa
Teline salsoloides
Thermopsis turcica
Trifolium bobrovii, Bobrov's clover
Trifolium gillettianum
Vicia bifoliolata
Vicia costae
Vicia erzurumica, Erzurumian vetch
Vicia ferreirensis
Vicia fulgens
Vicia menziesii, Hawaiian vetch
Vicia quadrijuga, Quadrijugous vetch
Vouacapoua americana
Zornia vaughaniana

Subspecies

Astragalus macrocarpus subsp. lefkarensis, Lefkara milk-vetch

Varieties

Humboldtia unijuga var. trijuga

Caryophyllales

There are 145 species, two subspecies, and one variety in the order Caryophyllales assessed as critically endangered.

Caryophyllaceae

Species

Allochrusa takhtajanii, Takhtadjyan's allochrusa
Alsinidendron lychnoides
Alsinidendron obovatum
Alsinidendron trinerve, Three nerved alsinidendron
Alsinidendron viscosum, Climbing alsinidendron
Arenaria bolosii
Arenaria nevadensis
Arenaria radians
Bufonia takhtajanii, Takhtadjyan's bufonia
Dianthus morisianus
Drymaria monticola
Minuartia dirphya
Saponaria jagelii
Schiedea adamantis
Schiedea apokremnos
Schiedea attenuata (possibly extinct in the wild)
Schiedea haleakalensis
Schiedea helleri
Schiedea hookeri
Schiedea kaalae
Schiedea kauaiensis
Schiedea kealiae
Schiedea membranacea
Schiedea nuttallii
Schiedea perlmanii
Schiedea stellarioides
Schiedea viscosa
Silene alexandri
Silene chustupica, Khustup campion
Silene cobalticola
Silene gazulensis
Silene ispirensis, Ispirian catchfly
Silene nocteolens
Silene perlmanii (possibly extinct in the wild)

Subspecies

Moehringia intricata subsp. tejedensis

Cactus

Species

Acharagma aguirreanum
Arrojadoa albiflora
Arrojadoa marylaniae
Astrophytum caput-medusae
Cereus saddianus
Cipocereus pusilliflorus
Cleistocactus hoffmannii
Cleistocactus xylorhizus
Coleocephalocereus braunii
Coleocephalocereus diersianus
Coleocephalocereus purpureus
Consolea corallicola, Florida semaphore cactus
Consolea falcata
Copiapoa ahremephiana
Copiapoa angustiflora
Copiapoa decorticans
Copiapoa esmeraldana
Corynopuntia reflexispina
Coryphantha potosiana
Cylindropuntia hystrix
Discocactus cangaensis
Discocactus hartmannii
Discocactus petr-halfari
Discocactus subterraneo-proliferans (possibly extinct in the wild)
Echinocereus nivosus
Echinopsis walteri
Eriosyce chilensis
Eriosyce laui
Estevesia alex-bragae
Gymnocalycium albiareolatum
Gymnocalycium neuhuberi
Gymnocalycium ragonesei
Haageocereus pacalaensis
Haageocereus tenuis
Hylocereus escuintlensis
Leptocereus carinatus
Leptocereus grantianus
Leptocereus leonii
Leptocereus scopulophilus
Leptocereus wrightii
Mammillaria albiflora
Mammillaria anniana
Mammillaria carmenae
Mammillaria duwei
Mammillaria glochidiata
Mammillaria herrerae, Golf ball
Mammillaria humboldtii
Mammillaria laui
Mammillaria manana
Mammillaria marcosii
Mammillaria pennispinosa
Mammillaria sanchez-mejoradae
Mammillaria schwarzii
Mammillaria theresae
Mammillaria zeilmanniana
Matucana aureiflora
Matucana huagalensis
Matucana madisoniorum
Matucana ritteri
Melocactus braunii
Melocactus brederooianus
Melocactus conoideus
Melocactus ferreophilus
Micranthocereus streckeri
Mirabella estevesii (possibly extinct in the wild)
Myrtillocactus eichlamii
Opuntia abjecta
Opuntia chaffeyi
Parodia arnostiana
Parodia buiningii
Parodia crassigibba
Parodia herteri
Parodia neohorstii
Parodia nivosa
Parodia nothorauschii
Parodia rechensis
Parodia werdermanniana
Pediocactus knowltonii, Knowlton's cactus
Peniocereus maculatus
Peniocereus occidentalis
Peniocereus zopilotensis
Pereskia quisqueyana
Pilosocereus azulensis
Pilosocereus diersianus
Pilosocereus frewenii
Pygmaeocereus bylesianus
Rhipsalis mesembryanthemoides
Rhipsalis pentaptera
Rhipsalis triangularis
Sclerocactus brevispinus, Pariette cactus
Stenocereus chacalapensis
Turbinicarpus alonsoi
Turbinicarpus gielsdorfianus
Turbinicarpus hoferi
Turbinicarpus laui
Turbinicarpus mandragora
Turbinicarpus swobodae
Uebelmannia buiningii
Weberocereus frohningiorum

Subspecies

Ariocarpus bravoanus subsp. bravoanus

Other Caryophyllales

Species

Achyranthes mutica, Blunt chaff flower
Amaranthus brownii
Atriplex plebeja
Beta patula
Charpentiera densiflora, Dense-flowered charpentiera
Cremnophyton lanfrancoi, Maltase cliff-orache
Delosperma macellum
Kewa acida, Salad plant
Khadia beswickii
Patellifolia webbiana
Pisonia graciliscens
Pisonia margaretiae

Varieties

Achyranthes splendens var. rotundata

Fagales

Species

Alnus henryi (possibly extinct)
Betula chichibuensis, Chichibu birch
Betula gynoterminalis (possibly extinct)
Betula halophila
Betula klokovii
Betula murrayana, Murray birch
Carpinus putoensis, Puto hornbeam
Carpinus tientaiensis
Castanea dentata, American Chestnut
Castanopsis catappaefolia
Cyclobalanopsis repandifolia
Nothofagus nuda
Ostrya chisosensis, Chisos hop-hornbeam
Ostrya rehderiana
Pasania formosana
Quercus boyntonii, Boynton oak
Quercus graciliformis, Slender oak
Quercus hinckleyi, Hinckley's oak
Quercus hintonii
Quercus mulleri
Quercus tardifolia, Chisos Mountains oak

Subspecies

Betula lenta subsp. uber, Virginia round-leaf birch
Betula procurva subsp. schugnanica

Other dicotyledons

Species

Bruguiera hainesii
Callitriche pulchra
Cassipourea eketensis
Cassipourea subcordata
Cassipourea subsessilis
Clethra coloradensis
Dillenia triquetra
Haloragis stokesii
Hibbertia bouletii
Hibbertia favieri
Linum cratericola, Floreana flax
Melanophylla angustior
Melanophylla perrieri
Molinadendron hondurense
Myrica rivas-martinezii
Nyssa yunnanensis
Plantago almogravensis
Plantago famarae
Plantago robusta, St Helena plantain
Rafflesia magnifica
Rhododendron wilhelminae
Rhodothamnus sessilifolius, Sessile-leaved rhodothamnus
Salix tarraconensis
Schumacheria alnifolia
Swida darvasica

Varieties

Rhododendron protistum var. giganteum

There are 421 species, six subspecies, and five varieties of monocotyledon assessed as critically endangered.

Arecales

Species

Acanthophoenix rubra
Asterogyne yaracuyense
Astrocaryum minus
Attalea crassispatha
Bactris nancibaensis
Balaka macrocarpa
Calamus compsostachys
Calamus obovoideus
Calamus sabalensis
Calamus wailong
Carpoxylon macrospermum
Ceroxylon sasaimae
Chamaedorea plumosa
Coccothrinax borhidiana
Cryosophila cookii
Cryosophila grayumii
Cyphophoenix nucele
Cyphosperma tanga
Drymophloeus samoensis
Dypsis albofarinosa
Dypsis ambanjae
Dypsis ambositrae
Dypsis ampasindavae
Dypsis andilamenensis
Dypsis anjae
Dypsis antanambensis
Dypsis aquatilis
Dypsis arenarum
Dypsis basilonga
Dypsis beentjei
Dypsis brevicaulis
Dypsis brittiana (possibly extinct)
Dypsis canaliculata
Dypsis carlsmithii
Dypsis caudata
Dypsis cookei
Dypsis digitata
Dypsis dracaenoides
Dypsis elegans
Dypsis gronophyllum
Dypsis hovomantsina
Dypsis humilis
Dypsis ifanadianae
Dypsis intermedia
Dypsis interrupta
Dypsis jeremiei
Dypsis laevis
Dypsis lanuginosa
Dypsis leptocheilos
Dypsis mahia
Dypsis mangorensis
Dypsis metallica
Dypsis nauseosa
Dypsis nossibensis
Dypsis oropedionis
Dypsis ovobontsira
Dypsis pervillei
Dypsis pulchella
Dypsis pumila
Dypsis rakotonasoloi
Dypsis ramentacea
Dypsis reflexa
Dypsis remotiflora
Dypsis robusta
Dypsis sahanofensis
Dypsis sancta
Dypsis sanctaemariae
Dypsis scandens
Dypsis singularis
Dypsis tanalensis
Dypsis tokoravina
Dypsis trapezoidea
Dypsis vonitrandambo
Hemithrinax ekmaniana
Hyophorbe amaricaulis
Hyophorbe lagenicaulis, Bottle palm
Hyophorbe vaughanii
Hyophorbe verschaffeltii
Lavoixia macrocarpa
Loxococcus rupicola
Masoala madagascariensis
Medemia argun
Pelagodoxa henryana
Pinanga tashiroi
Pritchardia affinis
Pritchardia aylmer-robinsonii
Pritchardia hardyi
Pritchardia kaalae
Pritchardia limahuliensis
Pritchardia munroi
Pritchardia napaliensis
Pritchardia schattaueri
Pritchardia viscosa
Pritchardiopsis jeanneneyi
Pseudophoenix ekmanii
Pseudophoenix lediniana
Ravenea beentjei
Ravenea delicatula
Ravenea hypoleuca
Ravenea lakatra
Ravenea latisecta
Ravenea louvelii
Ravenea moorei
Ravenea musicalis
Tahina spectabilis, Tahina palm
Tectiphiala ferox
Voanioala gerardii

Varieties

Dictyosperma album var. album
Dictyosperma album var. conjugatum, Hurricane palm
Roystonea regia var. hondurensis

Orchidales

There are 167 species and one subspecies in Orchidales assessed as critically endangered.

Orchidaceae

Species

Aeranthes albidiflora (possibly extinct)
Aeranthes leandriana
Aeranthes multinodis
Amesiella monticola
Anathallis kleinii
Angraecum mahavavense (possibly extinct)
Angraecum muscicolum (possibly extinct)
Angraecum palmicolum
Angraecum perhumile (possibly extinct)
Angraecum peyrotii
Angraecum pinifolium
Angraecum potamophilum (possibly extinct)
Angraecum rigidifolium (possibly extinct)
Angraecum rubellum (possibly extinct)
Angraecum serpens (possibly extinct)
Angraecum sterrophyllum (possibly extinct)
Anguloa cliftonii, Clifton's anguloa
Ascoglossum calopterum
Benthamia dauphinensis
Benthamia nigro-vaginata (possibly extinct)
Brachionidium pteroglossum
Bulbophyllum ceriodorum
Bulbophyllum erythroglossum (possibly extinct)
Bulbophyllum filiforme
Bulbophyllum hirsutiusculum (possibly extinct)
Bulbophyllum kupense
Bulbophyllum minax (possibly extinct)
Bulbophyllum moratii
Bulbophyllum sanguineum (possibly extinct)
Bulbophyllum tampoketsense (possibly extinct)
Bulbophyllum zaratananae (possibly extinct)
Ceratocentron fesselii
Corybas dienemus, Windswept helmet orchid
Cryptopus dissectus
Cyclopogon werffii
Cynorkis ambondrombensis
Cynorkis bimaculata (possibly extinct)
Cynorkis catatii (possibly extinct)
Cynorkis formosa
Cynorkis globifera
Cynorkis henrici
Cynorkis humbertii
Cynorkis monadenia
Cynorkis muscicola
Cynorkis pinguicularioides
Cynorkis pseudorolfei
Cynorkis rolfei (possibly extinct)
Cynorkis sacculata
Cynorkis sagittata
Cynorkis schlechterii
Cynorkis souegesii
Cynorkis sylvatica (possibly extinct)
Cynorkis tristis
Cynorkis usambarae (possibly extinct)
Cypripedium daweishanense
Cypripedium froschii
Cypripedium malipoense, Malipo cypripedium
Cypripedium segawae, Segawa's cypripedium
Cypripedium taibaiense, Mt Taibai cypripedium
Cypripedium wumengense
Dendrobium huoshanense
Dendrobium officinale
Dendrobium schuetzei
Dendrophylax fawcettii
Diaphananthe orientalis (possibly extinct)
Diplandrorchis sinica
Disperis bosseri (possibly extinct)
Disperis ciliata
Disperis egregia (possibly extinct)
Diuris byronensis, Byron Bay donkey orchid
Encyclia kingsii
Epidendrum montserratense, Montserrat orchid
Eulophia grandidieri (possibly extinct)
Eulophia mangenotiana
Gastrochilus calceolaris
Gastrodia africana
Gastrodia zeylanica
Genyorchis platybulbon
Goodyera flaccida
Goodyera macrophylla
Goodyera perrieri
Grammangis spectabilis
Grandiphyllum schunkeanum
Graphorkis medemiae
Habenaria maitlandii
Hexalectris revoluta, Chisos mountain crested coralroot
Holopogon gaudissartii
Liparis goodyeroides
Malaxis bayardii, Bayard's adder's-mouth orchid
Masdevallia apparitio, Apparition masdevallia
Mexipedium xerophyticum, Dry-growing mexipedium
Mystacidium nguruense
Ossiculum aurantiacum
Paphiopedilum adductum
Paphiopedilum bougainvilleanum, Bougainville paphiopedilum
Paphiopedilum canhii
Paphiopedilum cornuatum
Paphiopedilum dayanum, Day's paphiopedilum
Paphiopedilum delenatii, Delanat's paphiopedilum
Paphiopedilum druryi, Drury's paphiopedilum
Paphiopedilum emersonii, Emerson's paphiopedilum
Paphiopedilum exul, Excluded paphiopedilum
Paphiopedilum fairrieanum, Fairrie's paphiopedilum
Paphiopedilum fowliei, Fowlie's paphiopedilum
Paphiopedilum gigantifolium, Giant-leaf paphiopedilum
Paphiopedilum gratrixianum, Gratix's paphiopedilum
Paphiopedilum guangdongense
Paphiopedilum hangianum, Hang's paphiopedilum
Paphiopedilum helenae, Ellen's paphiopedilum
Paphiopedilum henryanum, Henry's paphiopedilum
Paphiopedilum inamorii, Inamori's paphiopedilum
Paphiopedilum intaniae, Intani paphiopedilum
Paphiopedilum kolopakingii, Kolopaking's paphiopedilum
Paphiopedilum lawrenceanum, Lawrence's paphiopedilum
Paphiopedilum liemianum, Liem's paphiopedilum
Paphiopedilum micranthum, Tiny flowered paphiopedilum
Paphiopedilum ooii, Ooi's paphiopedilum
Paphiopedilum parnatanum, Parnata's paphiopedilum
Paphiopedilum platyphyllum, Broad-leaf paphiopedilum
Paphiopedilum primulinum, Primrose yellow paphiopedilum
Paphiopedilum purpuratum, Purple paphiopedilum
Paphiopedilum qingyongii
Paphiopedilum rothschildianum, Rothschild's paphiopedilum
Paphiopedilum sanderianum, Sander's paphiopedilum
Paphiopedilum sangii, Sang's paphiopedilum
Paphiopedilum schoseri, Schoser's paphiopedilum
Paphiopedilum stonei, Stone's paphiopedilum
Paphiopedilum sugiyamanum, Sugiyama's paphiopedilum
Paphiopedilum sukhakulii, Sukhakul's paphiopedilum
Paphiopedilum supardii, Supard's paphiopedilum
Paphiopedilum thaianum, Thai paphiopediulum
Paphiopedilum tranlienianum, Tran's paphiopedilum
Paphiopedilum urbanianum, Urban's paphiopedilum
Paphiopedilum victoria-mariae, Virgin Mary paphiopedilum
Paphiopedilum victoria-regina, Queen Victoria paphiopedilum
Paphiopedilum vietnamense, Vietnamese paphiopedilum
Paphiopedilum wenshanense, Wenshan paphiopedilum
Paphiopedilum wentworthianum, Wentworth's paphiopedilum
Peristylus holochila
Phalaenopsis hainanensis
Phalaenopsis micholitzii
Phragmipedium andreettae
Phragmipedium anguloi
Phragmipedium christiansenianum, Christiansen's phragmipedium
Phragmipedium dalessandroi, Dalessandro's phragmipedium
Phragmipedium exstaminodium, Without a staminoda phragmipedium
Phragmipedium fischeri, Fischer's phragmipedium
Phragmipedium kovachii, Kovach's phragmipedium
Phragmipedium manzurii, Manzur's phragmipedium
Phragmipedium richteri, Richter's phragmipedium
Phragmipedium tetzlaffianum, Tetzlaff's phragmipedium
Polystachya acuminata (possibly extinct)
Polystachya canaliculata (possibly extinct)
Polystachya kupensis
Polystachya porphyrochila (possibly extinct)
Polystachya rugosilabia (possibly extinct)
Polystachya victoriae
Prasophyllum favonium, Western leek orchid
Selenipedium chironianum
Selenipedium vanillocarpum
Serapias stenopetala
Tridactyle sarcodantha (possibly extinct)
Zeuxine rolfeana

Subspecies

Cynorkis buchwaldiana subsp. buchwaldiana

Aechmea cymosopaniculata (possibly extinct)
Cryptanthus diamantinensis
Guzmania bismarckii
Guzmania lepidota (possibly extinct)
Guzmania poortmanii (possibly extinct)
Guzmania striata (possibly extinct)
Hohenbergia caymanensis, Old George
Pitcairnia elliptica
Pitcairnia oranensis
Puya compacta
Puya exigua
Tillandsia dyeriana
Tillandsia yerba-santae

Liliales

Species

Allium baytopiorum, Baytop's onion
Allium corsicum
Allium czelghauricum, Czelghaurian onion
Aloe boscawenii
Aloe brunneostriata
Aloe classenii
Aloe dorotheae
Aloe flexilifolia
Aloe ghibensis
Aloe helenae
Aloe jucunda
Aloe leptosiphon
Aloe molederana
Aloe pembana
Aloe suzannae
Aloidendron pillansii (as Aloe pillansii), Bastard quiver tree
Astelia waialealae
Bomarea angustifolia
Bomarea goniocaulon
Bomarea graminifolia
Bomarea hartwegii
Bomarea longipes
Borderea chouardii
Brimeura duvigneaudii
Chlorophytum borivilianum
Chlorophytum petrophilum
Chlorophytum rhizopendulum
Colchicum greuteri, Greuter's colchicum
Colchicum leptanthum, Thin-flowered colchicum
Crinum malabaricum
Dioscorea strydomiana
Fritillaria grandiflora, Big-flowered fritillary
Gagea antakiensis, Antakya gagea
Galanthus trojanus
Iris antilibanotica
Iris atropurpurea, Coastal iris
Iris boissieri
Iris cedreti
Iris damascena
Iris nusairiensis
Lilium polyphyllum
Mastigostyla orurensis
Ornithogalum gabrielianiae, Gabrielyan's starflowers
Romulea antiatlantica
Scilla morrisii, Morris squill
Tulipa gumusanica, Gumushanian tulip

Subspecies

Narcissus nevadensis subsp. enemeritoi

Arales

Araceae

Species

Alocasia atropurpurea
Alocasia sanderiana, Sander's alocasia
Alocasia sinuata, Alocasia quilted dreams
Amorphophallus interruptus
Amorphophallus lanuginosus
Amorphophallus synandrifer
Anthurium coerulescens
Anthurium eggersii
Anthurium linguifolium
Anthurium tenuicaule
Arisaema kawashimae
Arisaema rostratum
Hapaline locii
Philodendron balaoanum (possibly extinct)
Philodendron cruentospathum
Philodendron nanegalense
Philodendron pogonocaule
Syngonium dodsonianum
Typhonium lineare
Typhonium penicillatum

Subspecies

Arisaema heterocephalum subsp. okinawaense

Zingiberales

Alpinia diversifolia
Calathea dodsonii
Calathea petersenii
Costus barbatus
Costus geothyrsus
Costus louisii
Costus vinosus (possibly extinct in the wild)
Curcuma vitellina
Newmania serpens
Smithatris supraneanae

Eriocaulales

Commelinales

Commelina mwatayamvoana
Xyris andina
Xyris diaphanobracteata
Xyris exigua
Xyris ramboi

Cyperales

There are 37 species, two subspecies, and two varieties in Cyperales assessed as critically endangered.

Gramineae

Species

Andropogon benthamianus (possibly extinct)
Cenchrus agrimonioides
Eragrostis episcopulus, Cliff hair grass
Eragrostis muerensis
Festuca aloha
Garnotia cheesemanii, Rarotongan garnotia grass
Garnotia sechellensis
Humbertochloa greenwayi
Isachne meeboldii
Isachne veldkampii
Ischaemum jayachandranii
Panicum niihauense
Panicum pearsonii (possibly extinct)
Panicum socotranum
Poa mannii
Poa siphonoglossa
Puccinellia raroflorens
Sporobolus caespitosus
Stipa tulcanensis

Subspecies

Puccinellia distans subsp. embergeri
Puccinellia distans subsp. font-queri

Varieties

Cenchrus agrimonioides var. agrimonioides

Cyperaceae

Species

Bulbostylis fusiformis
Bulbostylis neglecta, Neglected tuft sedge
Carex austromexicana
Carex collifera
Carex lapazensis
Carex lepida
Carex ownbeyi
Carex tessellata
Cyperus chionocephalus (possibly extinct)
Cyperus flavoculmis
Cyperus grandifolius
Cyperus microcristatus
Cyperus microumbellatus
Cyperus multifolius (possibly extinct)
Eleocharis lepta (possibly extinct)
Fimbristylis hirsutifolia
Hypolytrum subcompositus
Scleria guineensis

Varieties

Cyperus pennatiformis var. bryanii

Other monocotyledons

Species

Subspecies

Najas marina subsp. arsenariensis

[1]
"IUCN Red List version 2023-1". The IUCN Red List of Threatened Species. International Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 31 December 2023.
[2]
"Table 9: Possibly Extinct and Possibly Extinct in the Wild Species (IUCN Red List version 2023-1)". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 31 December 2023.
[3]
"Limitations of the Data". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 11 January 2016.
[4]
"2001 Categories & Criteria (version 3.1)". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 11 January 2016.
[5]
Farjon, A. (2013). "Pinus torreyana subsp. torreyana". IUCN Red List of Threatened Species. 2013: e.T34015A2840365. doi:10.2305/IUCN.UK.2013-1.RLTS.T34015A2840365.en. Retrieved 27 September 2020.

[1] xcludes data deficient evaluations.

[2] NT, LR/cd, LC.

[3] Threatened comprises CR, EN and VU.

[4] Chart omits extinct (EX) species

[IUCNDATA-5] [1]
"IUCN Red List version 2023-1". The IUCN Red List of Threatened Species. International Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 31 December 2023.

[IUCNPE-6] [2]
"Table 9: Possibly Extinct and Possibly Extinct in the Wild Species (IUCN Red List version 2023-1)". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 31 December 2023.

[7] [3]
"Limitations of the Data". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 11 January 2016.

[8] [4]
"2001 Categories & Criteria (version 3.1)". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 11 January 2016.

[iucn-ptt-9] [5]
Farjon, A. (2013). "Pinus torreyana subsp. torreyana". IUCN Red List of Threatened Species. 2013: e.T34015A2840365. doi:10.2305/IUCN.UK.2013-1.RLTS.T34015A2840365.en. Retrieved 27 September 2020.

[1]

[2]

[a]

[b]

[c]

[d]

[3]

[4]

[5]

Other Polypodiales species

Other pteridophyte species

Other Theales species

Other Rosales

Other Scrophulariales species

Other Caryophyllales

Other dicotyledons

Other monocotyledons

Other Polypodiales species