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{{Taxobox
| color = lightgreen
| name = ''Rhododendron'' subsect. ''Ledum''
| image = Bagno zwyczajne Ledum palustre.jpg
| image_width = 240px
| image_caption = ''Rhododendron tomentosum'' (''Ledum palustre'')
| regnum = [[Plant]]ae
| divisio = [[Flowering plant|Magnoliophyta]]
| classis = [[Magnoliopsida]]
| ordo = [[Ericales]]
| familia = [[Ericaceae]]
| genus = ''[[Rhododendron]]''
| subsectio = '''''Ledum'''''
| subdivision_ranks = Species
| subdivision =
See text.
}}
'''''Ledum''''' is a [[genus]] name formerly widely recognised in the [[family (biology)|family]] [[Ericaceae]], including 8 species of [[evergreen]] [[shrub]]s native to cool temperate and subarctic regions of the [[Northern Hemisphere]] and commonly known as '''Labrador Tea'''.
Recent [[Genetics|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'''''.
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.
;Species
The species formerly listed in ''Ledum'', with their current accepted names in ''Rhododendron'', are:
*''Ledum decumbens'' = ''[[Rhododendron subarcticum]]'' Harmaja
*''Ledum glandulosum'' = ''[[Rhododendron neoglandulosum]]'' Harmaja
*''Ledum groenlandicum'' = ''[[Rhododendron groenlandicum]]'' (Oeder) Kron & Judd
*''Ledum hypoleucum'' = ''[[Rhododendron hypoleucum]]'' (Kom.) Harmaja
*''Ledum macrophyllum'' = ''[[Rhododendron tolmachevii]]'' Harmaja
*''Ledum palustre'' = ''[[Rhododendron tomentosum]]'' Harmaja
*''Ledum palustre'' var. ''diversipilosum'' = ''[[Rhododendron diversipilosum]]'' (Nakai) Harmaja
*''Ledum subulatum'' = ''[[Rhododendron subulatum]]'' (Nakai) Harmaja
;Hybrids
One natural [[hybrid]] also occurs:
*''Ledum columbianum'' = ''Rhododendron × columbianum'' (''R. groenlandicum'' × ''R. neoglandulosum'')
===Uses===
The [[Athabascan]]s use it the leaves to prepare a tea-like beverage, hence the common name. It is also a traditional medicine among them for weak blood, colds, tuberculosis, dizziness, stomach problems, heartburn and hangover. Some people chew the raw leaves because they like the taste. Others use Labrador Tea to spice meat by boiling the leaves and branches in water and then soak the meat in the tea. The meat may also be boiled directly in the water with the stems and leaves. This spice is said to be especially good for strong-tasting meat, such as brown bear meat that has a fishy taste.
In large doses, Labrador Tea can cause drowsiness, stomach ache, and act as a laxative. Use in moderation. Ledum glandulosum ('Western Labrador Tea', 'Trapper's Tea') becomes toxic if cooked for long periods in a closed container (citation needed). Labrador Tea grows slowly, but, as an evergreen, is available year-round. Users should take care not to over-harvest leaves from any single plant.
Ledum grows together with some poisonous plants such as [[Bog-laurel]] and [[Bog-rosemary]].
==References==
1. Kron, Kathleen A. & Judd, Walter S. (1990) Phylogenetic Relationships within the Rhodoreae (Ericaceae) with Specific Comments on the Placement of ''Ledum'' Systematic Botany (1990), 1S(1): pp. S7-68
2. Harmaja, Harri (1990) New names and nomenclatural combinations in ''Rhododendron'' (Ericaceae) Ann. Bot. Fennici 27:203-204
3. Harmaja, Harri (1991) Taxonomic notes on ''Rhododendron'' subsection Ledum (''Ledum'', Ericaceae), with a key to its species. ''Ann. Bot. Fennici'' 28: 171-173.
[http://www.sekj.org/PDF/anbf35/anbf35-263p.pdf 4. Harmaja, Harri (1999) ''Rhododendron diversipilosum'', comb. nov. (Ericaceae). Ann. Bot. Fennici 35: 263-264]
[http://www.sekj.org/PDF/anb39-free/anb39-183s.pdf 5. Harmaja, Harri (2002) ''Rhododendron subulatum'', comb. nova (Ericaceae). Ann. Bot. Fennici 39: 183-184]
6. Kihlman, Bengt A. (2004) Hybrids Between Ledums and Lepidote Rhododendrons. Journal of the American Rhododendron Society 58(2):74-81
[[Category:Ericaceae]]
[[Category:Herbs]]
[[Category:Herbal tea]]
| color = lightgreen
| name = ''Rhododendron'' subsect. ''Ledum''
| image = Bagno zwyczajne Ledum palustre.jpg
| image_width = 240px
| image_caption = ''Rhododendron tomentosum'' (''Ledum palustre'')
| regnum = [[Plant]]ae
| divisio = [[Flowering plant|Magnoliophyta]]
| classis = [[Magnoliopsida]]
| ordo = [[Ericales]]
| familia = [[Ericaceae]]
| genus = ''[[Rhododendron]]''
| subsectio = '''''Ledum'''''
| subdivision_ranks = Species
| subdivision =
See text.
}}
'''''Ledum''''' is a [[genus]] name formerly widely recognised in the [[family (biology)|family]] [[Ericaceae]], including 8 species of [[evergreen]] [[shrub]]s native to cool temperate and subarctic regions of the [[Northern Hemisphere]] and commonly known as '''Labrador Tea'''.
Recent [[Genetics|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'''''.
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.
;Species
The species formerly listed in ''Ledum'', with their current accepted names in ''Rhododendron'', are:
*''Ledum decumbens'' = ''[[Rhododendron subarcticum]]'' Harmaja
*''Ledum glandulosum'' = ''[[Rhododendron neoglandulosum]]'' Harmaja
*''Ledum groenlandicum'' = ''[[Rhododendron groenlandicum]]'' (Oeder) Kron & Judd
*''Ledum hypoleucum'' = ''[[Rhododendron hypoleucum]]'' (Kom.) Harmaja
*''Ledum macrophyllum'' = ''[[Rhododendron tolmachevii]]'' Harmaja
*''Ledum palustre'' = ''[[Rhododendron tomentosum]]'' Harmaja
*''Ledum palustre'' var. ''diversipilosum'' = ''[[Rhododendron diversipilosum]]'' (Nakai) Harmaja
*''Ledum subulatum'' = ''[[Rhododendron subulatum]]'' (Nakai) Harmaja
;Hybrids
One natural [[hybrid]] also occurs:
*''Ledum columbianum'' = ''Rhododendron × columbianum'' (''R. groenlandicum'' × ''R. neoglandulosum'')
===Uses===
The [[Athabascan]]s use it the leaves to prepare a tea-like beverage, hence the common name. It is also a traditional medicine among them for weak blood, colds, tuberculosis, dizziness, stomach problems, heartburn and hangover. Some people chew the raw leaves because they like the taste. Others use Labrador Tea to spice meat by boiling the leaves and branches in water and then soak the meat in the tea. The meat may also be boiled directly in the water with the stems and leaves. This spice is said to be especially good for strong-tasting meat, such as brown bear meat that has a fishy taste.
In large doses, Labrador Tea can cause drowsiness, stomach ache, and act as a laxative. Use in moderation. Ledum glandulosum ('Western Labrador Tea', 'Trapper's Tea') becomes toxic if cooked for long periods in a closed container (citation needed). Labrador Tea grows slowly, but, as an evergreen, is available year-round. Users should take care not to over-harvest leaves from any single plant.
Ledum grows together with some poisonous plants such as [[Bog-laurel]] and [[Bog-rosemary]].
==References==
1. Kron, Kathleen A. & Judd, Walter S. (1990) Phylogenetic Relationships within the Rhodoreae (Ericaceae) with Specific Comments on the Placement of ''Ledum'' Systematic Botany (1990), 1S(1): pp. S7-68
2. Harmaja, Harri (1990) New names and nomenclatural combinations in ''Rhododendron'' (Ericaceae) Ann. Bot. Fennici 27:203-204
3. Harmaja, Harri (1991) Taxonomic notes on ''Rhododendron'' subsection Ledum (''Ledum'', Ericaceae), with a key to its species. ''Ann. Bot. Fennici'' 28: 171-173.
[http://www.sekj.org/PDF/anbf35/anbf35-263p.pdf 4. Harmaja, Harri (1999) ''Rhododendron diversipilosum'', comb. nov. (Ericaceae). Ann. Bot. Fennici 35: 263-264]
[http://www.sekj.org/PDF/anb39-free/anb39-183s.pdf 5. Harmaja, Harri (2002) ''Rhododendron subulatum'', comb. nova (Ericaceae). Ann. Bot. Fennici 39: 183-184]
6. Kihlman, Bengt A. (2004) Hybrids Between Ledums and Lepidote Rhododendrons. Journal of the American Rhododendron Society 58(2):74-81
[[Category:Ericaceae]]
[[Category:Herbs]]
[[Category:Herbal tea]]
