E-Flora BC: Electronic Atlas of the Flora of British Columbia

Rhododendron groenlandicum (Oeder) K.A. Kron & W.S. Judd
Labrador tea (bog Labrador tea)
Ericaceae (Crowberry family)

Introduction to Vascular Plants

© Rod Innes  Email the photographer   (Photo ID #22465)

E-Flora BC Static Map
Distribution of Rhododendron groenlandicum
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Species Information

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Erect shrub; stems 0.5-1.5 m tall, rusty soft-hairy.
Alternate, evergreen, leathery, oblong to lance-oblong or elliptic, (1.2) 2-6 cm long, 3-15 mm wide, margins strongly to slightly rolled under, tips blunt, upper surface deep green, appearing somewhat wrinkled, glabrous to slightly reddish soft-hairy, copiously rusty or yellowish soft-hairy beneath; stalks 1-5 mm long.
In terminal umbrella-like clusters; flower stalks (0.6) 1.2-2.5 cm long, with short, white hairs (rarely with a few contorted, reddish hairs), often glandular, curved in fruit; corollas white, wheel-shaped, 10-12 mm across, the 5 distinct petals spreading, oblong, and 5-8 mm long; calyces less than 1 mm long, minutely white-hairy on margins, sometimes glandular; stamens 5-8, slightly exceeding the styles, filaments glabrous or sometimes hairy at the base.
Capsules, narrowly egg-shaped, 4-7 mm long, minutely hairy.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Bogs and moist to wet forests in the lowland and montane zones; common throughout most of BC, infrequent in SC BC; N to AK, E to NF, and S to OR, MN, PA, and NJ.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Rhododendron groenlandicum

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 5 853 1950
Slope Gradient (%) 0 8 173
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 352 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 5 8
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: BAFA(1), BWBS(872), CDF(11), CWH(382), ESSF(194), ICH(131), IDF(23), MH(13), MS(115), SBPS(71), SBS(513), SWB(174)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Ledum groenlandicum Oeder
Ledum palustre var. latifolium (Jacq.) Michx.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References