Draba nemorosa L.
woods draba (woodland draba; woods whitlow-grass)
Brassicaceae (Mustard family)
Introduction to Vascular Plants
woods draba (woodland draba; woods whitlow-grass)
Brassicaceae (Mustard family)
Introduction to Vascular Plants
Photograph
© Eileen Brown (Photo ID #24889)
Species Information
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.
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.
Illustration 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)
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) |
831 | 430 | 1816 |
| Slope
Gradient (%) |
29 | 0 | 78 |
|
Aspect (degrees) |
209 | 30 | 314 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
3 | 1 | 5 |
| Modal
Nutrient Regime
Class |
D | ||
| #
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) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and 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.Status Information
Synonyms
Synonyms and Alternate Names:
Draba lutea Gilib.
Draba nemorosa var. leiocarpa Lindbl.