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

Draba stenoloba Ledeb.
Alaska draba (Alaska whitlow-grass)
Brassicaceae (Mustard family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #25635)

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Distribution of Draba stenoloba
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Species Information

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General:
Biennial or short-lived perennial herb from a slender taproot and a usually simple stem-base; stems simple or branched, 3-32 cm tall, hairy below mainly with crosslike hairs, commonly glabrous above.
Leaves:
Basal leaves 10-25, 0.4-3 cm long, 1.5-9 mm wide, in a rosette, egg-shaped to oblanceolate, slightly minutely toothed or entire; stem leaves absent or 1-2 or sometimes as many as 4, elliptic to widely lanceolate, toothed or entire, 0.3-1.6 cm long, 2-10 mm wide; upper leaf surfaces with simple and short-stalked 2-branched, 3-branched, and crosslike hairs (mostly 2-branched or crosslike); undersurface of leaves with short-stalked 2-branched and crosslike hairs.
Flowers:
Racemes 2- to 15-flowered, open, often compound; flower stalks 3-15 mm long, commonly glabrous, seldom hairy, ascending; petals 3-3.5 mm long, yellow; sepals 1.5-2.5 mm long, soft-hairy or glabrous.
Fruits:
Silicles 10-20 mm long, 1.5-2 mm wide; narrowly elliptic to narrowly egg-shaped, plane, glabrous or rarely hairy; style to 0.1 mm long; seeds 16-40, oval, light brown, 1 mm long. vol2_4

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to dry meadows and cliffs in the subalpine and alpine zones; infrequent throughout BC; N to AK, YT, W NT and E to SW AB.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Draba stenoloba

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

Minimum

Average

Maximum

Elevation (metres) 630 1874 2450
Slope Gradient (%) 0 30 70
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 212 330
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 3 5
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
21
Modal BEC Zone Class
ESSF
All BEC Zones (# of stations/zone) species was recorded in: AT(4), BG(1), ESSF(6), IMA(1), SBS(1)

Climate

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.

Taxonomic and Nomenclatural Links

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General References