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

Loiseleuria procumbens (L.) Desv.
alpine-azalea (alpine azalea)
Ericaceae (Crowberry family)

Introduction to Vascular Plants

© Judith Holm  Email the photographer   (Photo ID #80855)

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Distribution of Loiseleuria procumbens
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Species Information

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Prostrate to depressed shrub; stems 5-30 cm long, glabrous or minutely hairy.
Evergreen, mostly opposite, leathery, lance-oblong to oblong, 3-8 mm long, 1-3 mm wide, margins rolled under, glabrous above, finely short hairy below; stalks 1-4 mm long, partially clasping.
In 2- to 6-flowered terminal clusters; flower stalks 1-10 mm long, straight or curved; corollas pink, bell-shaped, 5-lobed, 4-5 mm long; calyces red, 1.5-2.5 mm long, glabrous, persistent.
Capsules, egg-shaped, 3-5 mm long, 2-3 mm wide.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Bogs in the lowland and montane zones along the central and north coast, and dry to mesic heath and tundra in the alpine zone; frequent W of the Coast Mountains, infrequent in N and C BC; circumpolar, N to AK, YT, NT, E to NF and NS, and S to NW WA; Eurasia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Loiseleuria procumbens

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) 10 798 2264
Slope Gradient (%) 0 14 80
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 315 359
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 3 7
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: AT(1), bafa(4), CMA(9), CWH(31), ESSF(6), IMA(7), MH(10), SWB(2)

Ecological Indicator Information

A very shade-intolerant, montane to alpine, circumpolar evergreen shrub (transcontinental in North America). Occurs on very moist to wet, nitrogen-poor soils (Mor humus forms), within alpine tundra, boreal. cool temperate, and cool mesothermal climates; its occurrence increases with increasing latitude. Frequent in heath communities, occasionally found in parkland-like forests on water-shedding and near sea-level in hypermaritime muskegs of north coast. Associated with Barbilophozia floerkei, Cassiope mertensiana, Phyllodoce empetriformis, and Vaccinium uliginosum. An oxylophytic species characteristic of alpine and subalpine communities.

SourceIndicator Plants of Coastal British Columbia (Information applies to coastal locations only)


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

Azalea procumbens L.
Chamaecistus procumbens (L.) Kuntze
Kalmia procumbens (L.) Gift, Kron & P.F. Stevens ex Galasso, Banfi & F. Conti

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References