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Subsection of genus Rhododendron From Wikipedia, the free encyclopedia
Ledum was a genus in the family Ericaceae, including eight species of evergreen shrub native to cool temperate and subarctic regions of the Northern Hemisphere and commonly known as Labrador tea. It is now recognised as a subsection of section Rhododendron, subgenus Rhododendron, of the genus Rhododendron.
Rhododendron subsect. Ledum | |
---|---|
Rhododendron columbianum (Ledum glandulosum) | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Ericales |
Family: | Ericaceae |
Genus: | Rhododendron |
Subgenus: | Rhododendron subg. Rhododendron |
Section: | Rhododendron sect. Rhododendron |
Subsection: | R. subsect. Ledum (L.) Kron & Judd |
Species | |
See text |
Ledum species often grow together with poisonous plants such as bog-laurel and bog-rosemary, but certain species (e.g. L. groenlandicum and L. palustre) are easily distinguished by the distinctive rust coloured fuzz on the bottom of leaves.
Recent genetic evidence has shown that the species previously treated in this genus are correctly placed in the genus Rhododendron, where they are now treated as Rhododendron subsect. Ledum.[1] Because some of the species names used in Ledum could not be used in Rhododendron (the names already having been used for other species already in this large genus), new names had to be coined for them.[2]
The species listed in genus Ledum (accepted and synonyms), with their current accepted names are:
Ledum species | Author | GBIF status | TPL status | GBIF Accepted species | Author | GBIF status | TPL Accepted species | Author | TPL status |
---|---|---|---|---|---|---|---|---|---|
Ledum | L. | Accepted[Ledum 1] | |||||||
Ledum angustifolium | Hort. ex Lavallée | Accepted[Ledum 2] | |||||||
Ledum buxifolium | Bergius | Synonym[Ledum 3] | Kalmia buxifolia | (Bergius) Gift & Kron | Accepted[Kalmia 1] | ||||
Ledum californicum | Kellogg | Synonym[Ledum 4] | Ledum glandulosum | Accepted[Ledum 5] | |||||
Ledum columbianum | Piper | Synonym[Ledum 6] | Accepted[Ledum 7] | Rhododendron columbianum | (Piper) Harmaja | Accepted[Rhody 1] | |||
Ledum decumbens | (Ait.) Lodd. | Synonym[Ledum 8] | Rhododendron tomentosum subsp. decumbens | (Aiton) Elven & D.F.Murray | Accepted[Rhody 2] | ||||
Ledum decumbens | (Ait.) Lodd. ex Steud. | Synonym[Ledum 9] | Synonym[Ledum 10] | Rhododendron tomentosum subsp. decumbens | (Aiton) Elven & D.F.Murray | Accepted[Rhody 2] | Ledum palustre subsp. decumbens | Accepted[Ledum 11] | |
Ledum decumbens | Small | Accepted[Ledum 12] | Accepted[Ledum 13] | ||||||
Ledum glandulosum | Nutt. | Synonym[Ledum 14] | Accepted[Ledum 5] | Rhododendron neoglandulosum | Harmaja | Accepted[Rhody 3] | |||
Ledum glandulosum subsp. glandulosum | Synonym[Ledum 15] | Ledum glandulosum | Accepted[Ledum 5] | ||||||
Ledum glandulosum var. californicum | (Kellogg) C.L.Hitchc. | Synonym[Ledum 16] | Ledum glandulosum | Accepted[Ledum 5] | |||||
Ledum glandulosum var. glandulosum | Synonym[Ledum 17] | Ledum glandulosum | Accepted[Ledum 5] | ||||||
Ledum groenlandicum | Oeder | Synonym[Ledum 18] | Synonym[Ledum 19] | Rhododendron groenlandicum | (Oeder) K.A.Kron & W.S.Judd | Accepted[Rhody 4] | Ledum palustre subsp. groenlandicum | Accepted[Ledum 20] | |
Ledum groenlandicum | Retz. | Accepted[Ledum 21] | |||||||
Ledum groenlandicum f. denudatum | Vict. & J.Rousseau | Accepted[Ledum 22] | |||||||
Ledum groenlandicum subsp. glandulosum | (Nutt.) Á.Löve & D.Löve | Synonym[Ledum 23] | Synonym[Ledum 24] | Rhododendron neoglandulosum | Harmaja | Accepted[Rhody 3] | Ledum glandulosum | Accepted[Ledum 5] | |
Ledum groenlandicum var. aridiphilum | D.Löve | Accepted[Ledum 25] | |||||||
Ledum hypoleucum | Kom. | Synonym[Ledum 26] | Synonym[Ledum 27] | Rhododendron diversipilosum | (Nakai) H.Harmaja | Accepted[Rhody 5] | Rhododendron hypoleucum | (Kom.) Harmaja | Accepted[Rhody 6] |
Ledum idahoensis | Accepted[Ledum 28] | ||||||||
Ledum macrophyllum | Tolm. | Synonym[Ledum 29] | Accepted[Ledum 30] | Rhododendron diversipilosum | (Nakai) H.Harmaja | Accepted[Rhody 5] | |||
Ledum maximum | (Nakai) A.P.Khokhr. & M.T.Mazurenko | Synonym[Ledum 31] | Accepted[Ledum 32] | Rhododendron tomentosum | Harmaja | Accepted[Rhody 7] | |||
Ledum palustre | L. | Synonym[Ledum 33] | Accepted[Ledum 34] | Rhododendron tomentosum | Harmaja | Accepted[Rhody 7] | |||
Ledum palustre | Michx. | Synonym[Ledum 35] | Rhododendron groenlandicum | (Oeder) K.A.Kron & W.S.Judd | Accepted[Rhody 4] | ||||
Ledum palustre f. decumbens | (Aiton) Y.L.Chou & S.L.Tung | Synonym[Ledum 36] | Ledum palustre subsp. decumbens | Accepted[Ledum 11] | |||||
Ledum palustre subsp. angustissimum | Worosch. | Synonym[Ledum 37] | Rhododendron subulatum | (Nakai) Harmaja | Accepted[Rhody 8] | ||||
Ledum palustre subsp. decumbens | (Aiton) Hultén | Accepted[Ledum 11] | |||||||
Ledum palustre subsp. diversipilosum | Hara | Synonym[Ledum 38] | Ledum macrophyllum | Accepted[Ledum 30] | |||||
Ledum palustre subsp. groenlandicum | (Oeder) Hultén | Synonym[Ledum 39] | Accepted[Ledum 20] | Rhododendron groenlandicum | (Oeder) K.A.Kron & W.S.Judd | Accepted[Rhody 4] | |||
Ledum palustre var. angustifolium | Hook. | Accepted[Ledum 40][a] | |||||||
Ledum palustre var. angustum | E.A.Busch | Synonym[Ledum 41] | Ledum palustre | Accepted[Ledum 34] | |||||
Ledum palustre var. decumbens | Aiton | Synonym[Ledum 42] | Ledum palustre subsp. decumbens | Accepted[Ledum 11] | |||||
Ledum palustre var. diversipilosum | Nakai | Synonym[Ledum 43] | Synonym[Ledum 44] | Rhododendron diversipilosum | (Nakai) H.Harmaja | Accepted[Rhody 5] | Ledum macrophyllum | Accepted[Ledum 30] | |
Ledum palustre var. latifolium | (Jacq.) Hook. | Synonym[Ledum 45] | Rhododendron groenlandicum | (Oeder) K.A.Kron & W.S.Judd | Accepted[Rhody 4] | ||||
Ledum palustre var. latifolium | (Jacq.) Michx. | Synonym[Ledum 46] | Rhododendron groenlandicum | (Oeder) K.A.Kron & W.S.Judd | Accepted[Rhody 4] | ||||
Ledum palustre var. maximum | Nakai | Synonym[Ledum 47] | Ledum maximum | Accepted[Ledum 32] | |||||
Ledum palustre var. palustre | Synonym[Ledum 48] | Ledum palustre | Accepted[Ledum 34] | ||||||
Ledum palustre var. subulatum | Nakai | Synonym[Ledum 49] | Rhododendron subulatum | (Nakai) Harmaja | Accepted[Rhody 9] | ||||
Ledum serpyllifolium | Accepted[Ledum 50] | ||||||||
Ledum subulatum | (Nakai) A.P.Khokhr. & M.T.Mazurenko | Synonym[Ledum 51] | Synonym[Ledum 52] | Rhododendron subulatum | (Nakai) Harmaja | Accepted[Rhody 8] | Rhododendron subulatum | (Nakai) Harmaja | Accepted[Rhody 9] |
Ledum
Rhododendron
Other
Natural hybrids (nothospecies) also occur.
Some species (e.g. L. groenlandicum) have been used to produce Labrador tea. Other species have varying levels of toxicity (e.g. L. glandulosum). Evergreen Labrador tea grows slowly, but retains its leaves year-round. Users should take care not to over-harvest leaves from any single plant.
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