Draba porsildii G. Mulligan
Porsild's draba (Porsild's whitlow-grass)
Brassicaceae (Mustard family)

Introduction to Vascular Plants


© Jamie Fenneman     (Photo ID #21007)


E-Flora BC Static Map

Distribution of Draba porsildii
Click here to view the full interactive map and legend

Species Information

Tufted perennial herb from a taproot; stems 2-6.5 cm tall, glabrous to sparsely hairy.
Usually all basal, oblanceolate, 0.3-1.2 cm long, 1.5-2 mm wide, hairy with simple, branched, crosslike, and starlike (5-8 rays) hairs, entire; stem leaves lacking or sometimes 1.
Racemes 3- to 6-flowered; petals white, 2-3 mm long; sepals 1.5-2 mm long.
Silicles, 4-8 mm long, 2-3 mm wide, egg-shaped, glabrous; fruiting stalks shorter than silicles; styles 0.25 mm long; seeds 5-9, about 1 mm long.

SourceThe Illustrated Flora of British Columbia


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.


Ecological Framework for Draba porsildii

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)
2300 2077 2615
Slope Gradient (%)
6 0 15

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

267 180 355
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 1 3
Modal Nutrient Regime
# of field plots
 species was recorded in:
Modal BEC Zone Class

All BEC Zones (# of stations/zone) species was recorded in

AT(1), IMA(2)

Habitat and Range

Mesic to dry talus slopes, scree slopes and cliffs in the subalpine and alpine zones; rare in NE and SE BC; N to AK, S YT and W NT and E to SW AB.

SourceThe Illustrated Flora of British Columbia