Rhododendron subsect. Ledum

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Rhododendron subsect. Ledum
Ledum glandulosum 7486.JPG
Rhododendron columbianum (Ledum glandulosum)
Scientific classification
Kingdom:
(unranked):
(unranked):
(unranked):
Order:
Family:
Genus:
Subgenus:
Rhododendron
Section:
Rhododendron
Subsection:
Ledum

(L.) Kron & Judd
Species

See text.

Ledum was a genus in the family Ericaceae, including 8 species of evergreen shrubs 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.

Description[edit]

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.

Taxonomy[edit]

Reclassification into Rhododendron[edit]

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]

Species[edit]

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]

Species References[edit]

Ledum

  1. ^ GBIF Secretariat, ed. (2016). "Ledum L." GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  2. ^ GBIF Secretariat, ed. (2016). "Ledum angustifolium Hort. ex Lavallée". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  3. ^ TPL Reference: group=Ledum name=tro-50176889 Coming soon
  4. ^ TPL Reference: group=Ledum name=tro-50092423 Coming soon
  5. ^ a b c d e f TPL Reference: group=Ledum name=tro-12300614 Coming soon
  6. ^ GBIF Secretariat, ed. (2016). "Ledum columbianum Piper". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  7. ^ TPL Reference: group=Ledum name=tro-12300613 Coming soon
  8. ^ GBIF Secretariat, ed. (2016). "Ledum decumbens (Ait.) Loddiges". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  9. ^ GBIF Secretariat, ed. (2016). "Ledum decumbens (Ait.) Loddiges ex Steudel". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  10. ^ TPL Reference: group=Ledum name=kew-2349911 Coming soon
  11. ^ a b c d TPL Reference: group=Ledum name=kew-2355735 Coming soon
  12. ^ GBIF Secretariat, ed. (2016). "Ledum decumbens Small". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  13. ^ TPL Reference: group=Ledum name=tro-12300073 Coming soon
  14. ^ GBIF Secretariat, ed. (2016). "Ledum glandulosum Nutt". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  15. ^ TPL Reference: group=Ledum name=tro-12302631 Coming soon
  16. ^ TPL Reference: group=Ledum name=tro-12300615 Coming soon
  17. ^ TPL Reference: group=Ledum name=tro-12302504 Coming soon
  18. ^ GBIF Secretariat, ed. (2016). "Ledum groenlandicum Oeder". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  19. ^ TPL Reference: group=Ledum name=kew-2349909 Coming soon
  20. ^ a b TPL Reference: group=Ledum name=kew-2355734 Coming soon
  21. ^ GBIF Secretariat, ed. (2016). "Ledum groenlandicum Retz". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  22. ^ GBIF Secretariat, ed. (2016). "Ledum groenlandicum f. denudatum Vict. & J.Rousseau". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  23. ^ GBIF Secretariat, ed. (2016). "Ledum groenlandicum var. aridiphilum D.Löve". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  24. ^ TPL Reference: group=Ledum name=tro-50298977 Coming soon
  25. ^ GBIF Secretariat, ed. (2016). "Ledum groenlandicum var. aridiphilum D.Löve". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  26. ^ GBIF Secretariat, ed. (2016). "Ledum hypoleucum Komarov". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  27. ^ TPL Reference: group=Ledum name=tro-12303119 Coming soon
  28. ^ GBIF Secretariat, ed. (2016). "Ledum idahoensis". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  29. ^ GBIF Secretariat, ed. (2016). "Ledum macrophyllum Tolm". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  30. ^ a b c TPL Reference: group=Ledum name=tro-12300074 Coming soon
  31. ^ GBIF Secretariat, ed. (2016). "Ledum maximum (Nakai) A.P.Khokhrjakov & M.T.Mazurenko". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  32. ^ a b TPL Reference: group=Ledum name=tro-50194624 Coming soon
  33. ^ GBIF Secretariat, ed. (2016). "Ledum palustre L." GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  34. ^ a b c TPL Reference: group=Ledum name=kew-2349893 Coming soon
  35. ^ GBIF Secretariat, ed. (2016). "Ledum palustre Michx". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  36. ^ TPL Reference: group=Ledum name=tro-50156076 Coming soon
  37. ^ GBIF Secretariat, ed. (2016). "Ledum palustre subsp. angustissimum Worosch". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  38. ^ TPL Reference: group=Ledum name=tro-12303120 Coming soon
  39. ^ GBIF Secretariat, ed. (2016). "Ledum palustre subsp. groenlandicum (Oeder) Hulten". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  40. ^ GBIF Secretariat, ed. (2016). "Ledum palustre var. angustifolium Hook". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  41. ^ TPL Reference: group=Ledum name=tro-50156075 Coming soon
  42. ^ TPL Reference: group=Ledum name=kew-2355732 Coming soon
  43. ^ GBIF Secretariat, ed. (2016). "Ledum palustre var. diversipilosum Nakai". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  44. ^ TPL Reference: group=Ledum name=tro-12303121 Coming soon
  45. ^ GBIF Secretariat, ed. (2016). "Ledum palustre var. latifolium (Jacq.) Hook". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  46. ^ GBIF Secretariat, ed. (2016). "Ledum palustre var. latifolium (Jacq.) Michx". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  47. ^ TPL Reference: group=Ledum name=tro-50194625 Coming soon
  48. ^ TPL Reference: group=Ledum name=tro-50156073 Coming soon
  49. ^ TPL Reference: group=Ledum name=tro-50194628 Coming soon
  50. ^ GBIF Secretariat, ed. (2016). "Ledum serpyllifolium". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  51. ^ GBIF Secretariat, ed. (2016). "Ledum subulatum (Nakai) A.P.Khokhrjakov & M.T.Mazurenko". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  52. ^ TPL Reference: group=Ledum name=tro-50194629 Coming soon

Rhododendron

  1. ^ GBIF Secretariat, ed. (2016). "Rhododendron columbianum (Piper) Harmaja". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  2. ^ a b GBIF Secretariat, ed. (2016). "Rhododendron tomentosum subsp. decumbens (Aiton) Elven & D.F.Murray". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  3. ^ a b GBIF Secretariat, ed. (2016). "Rhododendron neoglandulosum Harmaja". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  4. ^ a b c d e GBIF Secretariat, ed. (2016). "Rhododendron groenlandicum (Oeder) K.A. Kron & W.S. Judd". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  5. ^ a b c GBIF Secretariat, ed. (2016). "Rhododendron diversipilosum (Nakai) H. Harmaja". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  6. ^ TPL Reference: group=Rhody name=tro-50303827 Coming soon
  7. ^ a b GBIF Secretariat, ed. (2016). "Rhododendron tomentosum Harmaja". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  8. ^ a b GBIF Secretariat, ed. (2016). "Rhododendron subulatum (Nakai) Harmaja". GBIF Backbone Taxonomy. Retrieved 2017-09-20.
  9. ^ a b TPL Reference: group=Rhody name=tro-50223463 Coming soon

Other

  1. ^ TPL Reference: group=Kalmia name=tro-50310693 Coming soon

Hybrids[edit]

Natural hybrids (nothospecies) also occur.

Uses[edit]

Ledum (L. groenlandicum) essential oil in clear glass vial

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.

See also[edit]

Notes[edit]

  1. ^ This is an inconsistency in GBIF data: the species name is a "Synonym" but a variety is "Accepted".

References[edit]

  1. ^ Harmaja 1991.
  2. ^ a b c Kihlman 2004
  3. ^ GBIF Secretariat, ed. (2016). "Rhododendron vanhoeffeni Abromeit". GBIF Backbone Taxonomy. Retrieved 2017-09-21.

Bibliography[edit]