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

Draba glabella Pursh var. glabella
smooth draba
Brassicaceae (Mustard family)

Introduction to Vascular Plants
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E-Flora BC Static Map
Distribution of Draba glabella var. glabella
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Species Information

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General:
Loosely tufted perennial herb from a taproot and a simple or branched stem-base; stems erect, 10-40 cm tall, starlike-hairy, rarely with a few simple hairs below.
Leaves:
Basal leaves oblanceolate, 0.5-4 cm long, 2-10 mm wide, entire or toothed; stem leaves 2-10, egg-shaped to lanceolate, 0.8-3 cm long, 3-12 mm wide, toothed or entire; hairy with stalked starlike hairs, 4- to 5-rayed with the longer 2 rays usually paralleling the leaf axis and again branched; margins hairy-fringed with mostly simple or branched hairs, generally starlike with branches again branched.
Flowers:
Racemes several- to many-flowered, occasionally with solitary flowers in upper leaf axils; flower stalks 2-15 mm long, ascending, straight, sparsely soft-hairy to glabrous; petals white, occasionally cream to yellow, notched at the tips, 3.5-5 mm long; sepals 2-3 mm long, sparsely soft-hairy.
Fruits:
Silicles, 6-15 mm long, 1.5-3 mm wide, lanceolate to oblong, plane or rarely twisted, glabrous or short-hairy; styles less than 0.25 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to mesic meadows and cliffs in the subalpine and alpine zones; rare in BC north of 51degree N; circumpolar, N to AK, YT and NT and E to NF.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Draba glabella var. glabella

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) 1500 1500 1500
Slope Gradient (%) 8 8 8
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
202 201 202
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
5 5 5
Modal Nutrient Regime
Class
B
Number of field plots
 species was recorded in:
1
Modal BEC Zone Class
SWB
All BEC Zones (# of stations/zone) species was recorded in: SWB(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.

Synonyms and Alternate Names

Draba arabisans var. canadensis (Burnet) Fern. & Knowlt.
Draba daurica DC.
Draba glabella var. megasperma (Fern. & Knowlt.) Fern.
Draba glabella var. orthocarpa (Fern. & Knowlt.) Fern.
Draba hirta auct. non L.
Draba megasperma Fern. & Knowlt.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References