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Glandular Labrador-tea - Ledum glandulosum
Other Names:
Ledum groenlandicum ssp. glandulosum, Rhododendron columbianum, Rhododendron neoglandulosum
Native Species
Global Rank:
G5
State Rank:
S5
(see State Rank Reason below)
C-value:
7
Agency Status
USFWS:
USFS:
BLM:
State Rank Reason (see State Rank above)
Ledum glandulosum is commonly found in many mesic to wet, montane and subalpine forests, streamsides and wet sites in western and central Montana. No significant and widespread threats to the species are known.
General Description
Stems erect-ascending, sparingly branched, to 120 cm; floral buds terminal, globose; foliage buds lateral, ovoid, closely crowded beneath the larger floral bud. Leaves alternate, petiolate, leathery; to ca. 15 mm long, elliptic to obovate, entire, dark green above, whitish, yellow glandular-dotted below. Inflorescence a crowded, umbel-like raceme of many flowers borne from the distal floral bud of last year’s stem, pedicels to 2 cm long. Flowers hypogynous, 5-merous; sepals, white, glandular, nearly separate; corolla dish-shaped; petals separate, white, oblong; stamens 10; ovary superior. Fruit an ovoid, 5-chambered capsule (Stickney in
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Our plants are variety
glandulosum.
Diagnostic Characteristics
Species Range
Montana Range
Range Descriptions
Native
Observations in Montana Natural Heritage Program Database
Number of Observations: 612
(Click on the following maps and charts to see full sized version)
Relative Density
Recency
(Observations spanning multiple months or years are excluded from time charts)
Habitat
Ecological Communities Associated with this Species
Wetland and Riparian
Riparian and Wetland Forest
Ecology
POLLINATORS The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap:
Bombus vagans and
Bombus ternarius (Colla and Dumesh 2010).
Stewardship Responsibility
References
- Literature Cited AboveLegend:
View Online Publication
Colla, S.R. and S. Dumesh. 2010. The bumble bees of southern Ontario: notes on natural history and distribution. Journal of the Entomological Society of Ontario 141:39-68.- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?- Clark, D. 1991. The effect of fire on Yellowstone ecosystem seed banks. M.Sc. Thesis. Montana State University, Bozeman. 115 pp.
- Gaffney, W.S. 1941. The effects of winter elk browsing, South Fork of the Flathead River, Montana. Journal of Wildlife Management 5(4):427-453.
- Hawkins, P.H. 1903. The alpine flora of Montana. M.Sc. Thesis, Bozeman, MT: Montana State University. 24 pp.
- Jones, W. W. 1901. Preliminary flora of Gallatin County. M.S. Thesis. Bozeman, MT: Montana State College. 78 pp.
- Law, D.J. 1999. A comparison of water table dynamics and soil texture under black cottonwood recent alluvial bar, beaked sedge, and Geyer's/Drummond's willow communities. M.Sc. Thesis. Bozeman, MT: Montana State University. 68 p.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
- Tyers, D.B. 2003. Winter ecology of moose on the Northern Yellowstone Winter Range. Ph.D. Dissertation. Bozeman, MT: Montana State University. 308 p.
- Web Search Engines for Articles on "Glandular Labrador-tea"
