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

Draba nemorosa L.
woods draba (woodland draba; woods whitlow-grass)
Brassicaceae (Mustard family)

Introduction to Vascular Plants

© Eileen Brown  Email the photographer   (Photo ID #24889)

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Distribution of Draba nemorosa
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Species Information

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General:
Annual herb from slender taproot; stems simple or branched, 5-25 (35) cm tall, hairy with both branched and starlike hairs, sometimes with some simple hairs or nearly glabrous.
Leaves:
Basal leaves few; stem leaves on lower third of stem, narrowly egg- or spoon-shaped; 1-3 cm long, 0.1-2 cm wide, minutely to regularly toothed; upper surface of leaves hairy with simple hairs and some long-stalked, 2-branched, 3-branched, and crosslike hairs; lower leaf surfaces with mostly crosslike hairs, but also some long-stalked, 2-branched and 3-branched hairs.
Flowers:
Racemes 10- to 50-flowered, long and lax; petals yellowish, 2.5-4 mm long; sepals 2-2.5 mm long, sparsely soft-hairy to glabrous.
Fruits:
Silicles, 3-10 mm long, 1-2 mm wide, elliptic to elliptic-oblanceolate, glabrous or hairy; fruiting stalks to 35 mm long, 1-5 times as long as silicles, spreading-ascending, glabrous; styles lacking; seeds 25-60, oval, light brown, about 0.7 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to dry open forests, grasslands and shrublands in the lowland, steppe and montane zones; common in S BC, rare northward; circumpolar, N to AK, YT and NT, E to PQ and S to CO and N CA; Eurasia.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Draba nemorosa

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) 430 831 1816
Slope Gradient (%) 0 29 78
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
30 209 314
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 3 5
Modal Nutrient Regime
Class
D
Number of field plots
 species was recorded in:
15
Modal BEC Zone Class
BG
All BEC Zones (# of stations/zone) species was recorded in: BG(8), IDF(2), MS(1), PP(1), SBS(3)

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.

Synonyms and Alternate Names

Draba lutea Gilib.
Draba nemorosa var. leiocarpa Lindbl.

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References