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)

E-Flora BC Static Map
Distribution of Draba stenoloba
Click here to view our interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.

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.
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.
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.
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


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




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
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: AT(4), BG(1), ESSF(6), IMA(1), SBS(1)


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

Additional Photo Sources

General References