Kalmia microphylla subsp. microphylla
western bog-laurel
Ericaceae (Crowberry family)

Introduction to Vascular Plants

Photograph

© Virginia Skilton     (Photo ID #16677)


Map

E-Flora BC Static Map

Distribution of Kalmia microphylla subsp. microphylla
Click here to view the full interactive map and legend

Species Information

General:
Low shrub; stems 10-50 cm tall, much branched; young stems finely hairy but soon becoming glabrous.
Leaves:
Evergreen, opposite, leathery, oblong-lanceolate to narrowly oblong, (0.6) 0.8-4 cm long, (2) 3-11 mm wide, entire, margins often rolled under, shiny, dark green and glabrous above, greyish and very finely and densely short glandular-hairy beneath, often with a prominent midrib; stalks 2-5 mm long.
Flowers:
In terminal 1- to 12-flowered clusters; flower stalks 1-4 cm long, usually glabrous; corollas deep pinkish-rose, saucer-shaped, 1-2 cm wide; calyces deeply 5-lobed, lobes egg-shaped, 2-3 mm long, glabrous or occasionally sparsely and minutely fringed; stamens 10, held in sacs on petals until full bloom, densely hairy just above the base, otherwise glabrous.
Fruits:
Five-valved capsules, nearly globe-shaped, glabrous, about 4 mm wide and 5 mm long.
Notes:
Two subspecies are recognized in BC:

1. Leaves oval to broadly elliptic, usually less than 2 cm long, and less than 2 times as long as wide; calyces less than 7 mm wide; plants occurring E of the Coast-Cascades Range in BC and usually at high elevations..............ssp. microphylla

1. Leaves lance-shaped, usually 2.5 cm long or longer, and 2.5-4 times as long as wide; calyces more than 7 mm wide; plants of coastal BC and intermittently inland, usuallyat low to moderate elevations..................ssp. occidentalis (Small) Taylor & MacBryde

SourceThe Illustrated Flora of British Columbia

Illustration

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Ecology

Ecological Framework for Kalmia microphylla ssp. microphylla

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

Avg

Min

Max

Elevation (metres)
1167 80 2110
Slope Gradient (%)
2 0 15

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

83 80 324
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
6 5 8
Modal Nutrient Regime
Class
B
# of field plots
 species was recorded in:
11
Modal BEC Zone Class
ESSF

All BEC Zones (# of stations/zone) species was recorded in

CWH(3), ESSF(5), ICH(2), SWB(1)

Habitat and Range

Peat bogs, wet peaty forests and meadows from the lowland through alpine zones; frequent throughout BC; N to AK, YT and NT, E to NW MB, and S to C CA, NV, UT, and CO.

SourceThe Illustrated Flora of British Columbia

Synonyms

Synonyms and Alternate Names:
Kalmia microphylla var. microphylla