Coreopsideae

Coreopsideae is a tribe of flowering plants belonging to the Asteroideae subfamily.^[1] It includes widely cultivated genera such as Coreopsis, after which the tribe is named, as well as Cosmos and Dahlia.

Coreopsideae
Cosmos bipinnatus field
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Subfamily:	Asteroideae
Tribe:	Coreopsideae (Less.) Lindl., 1829
Genera
See text

A similar group has been recognized since 1829, generally as part of the tribe Heliantheae (Cassini, 1819).^[2] In the late 20th century, molecular studies caused a slightly redefined version of this group to be recognized as its own tribe, Coreopsideae.^[2] The larger version of Heliantheae was split into tribes including Bahieae, Chaenactideae, Coreopsideae, Helenieae and, finally, Heliantheae (sensu stricto).^[3] Within the tribe, the traditional definition of genera based on flower and fruit characters does not reflect evolutionary relationships as inferred through molecular phylogenetics.^[4]

The tribe is characterized by shiny green bracts at the base of the flower head in two rows: an inner row of tightly spaced bracts and an outer row of a smaller number pointing downward.^[5] It includes five genera that use C₄ carbon fixation: Chrysanthellum, Eryngiophyllum, Glossocardia (including Guerreroia), Isostigma, and Neuractis. These genera are thought to share a common ancestor and thus a single origin of C₄ carbon fixation.^[6]

Genera

The 26 Coreopsideae genera recognized by the Global Compositae Database as of April 2022:^[7]

• Bidens L.
• Chrysanthellum Rich.
• Coreopsis L. – Electranthera was subsequently split off^[8]
• Cosmos Cav.
• Cyathomone S.F.Blake
• Dahlia Cav.
• Dicranocarpus A.Gray
• Diodontium F.Muell.
• Ericentrodea S.F.Blake
• Fitchia Hook.f.
• Glossocardia Cass.
• Goldmanella Greenm.
• Henricksonia B.L.Turner
• Heterosperma Cav.
• Hidalgoa La Llave
• Isostigma Less.
• Koehneola Urb.
• Moonia Arn.
• Narvalina Cass.
• Oparanthus Sherff
• Petrobium R.Br.
• Pinillosia Ossa ex DC.
• Selleophytum Urb.
• Tetraperone Urb.
• Thelesperma Less.
• Trioncinia (F.Muell.) Veldkamp

References

1. Asteroideae - Taxonomy
2. Ryding, Olof; Bremer, Kare (1992), "Phylogeny, Distribution, and Classification of the Coreopsideae (Asteraceae)", Systematic Botany, 17 (4): 649–659, doi:10.2307/2419733, JSTOR 2419733
3. Klaus Kubitzki, Joachim W. Kadereit, Charles Jeffrey; The Families and Genera of Vascular Plants
4. Rebecca T. Kimballa, Daniel J. Crawford (2004), "Phylogeny of Coreopsideae (Asteraceae) using ITS sequences suggests lability in reproductive characters", Molecular Phylogenetics and Evolution, 33 (1): 127–139, doi:10.1016/j.ympev.2004.04.022, PMID 15324843
5. Niehaus, Theodore F.; Ripper, Charles L. (1976), Pacific States Wildflowers, New York: Houghton Mifflin, ISBN 0-395-91095-1
6. Kellogg, E.A. (1999). "Phylogenetic aspects of the evolution of C₄ photosynthesis". In Sage, R.F.; Monson, R.K. (eds.). C₄ plant biology (PDF). San Diego, CA: Academic Press. pp. 411–444. ISBN 0126144400. Retrieved 2018-05-26.
7. "Coreopsideae Lindl". Global Compositae Database. Compositae Working Group (CWG). Retrieved 2022-04-04.
8. Pruski, J.F.; Tadesse, Mesfin & Crawford, D.J. (2015), "Studies of Neotropical Compositae–XI. The new generic name Electranthera (Coreopsideae)" (PDF), Phytoneuron, 2015–68: 1–17, retrieved 2024-05-13

External links

• Media related to Coreopsideae at Wikimedia Commons
• Data related to Coreopsideae at Wikispecies