Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnst.
Scouler's popcornflower (Hall's Willowherb)
Boraginaceae (Borage family)

Introduction to Vascular Plants


© Val George     (Photo ID #26458)


E-Flora BC Static Map

Distribution of Plagiobothrys scouleri
Click here to view the full interactive map and legend

Species Information

Annual herb from a taproot or fibrous roots; straight, slender, appressed-hairy throughout; stems numerous and prostrate to ascending, or single and erect, to 20 cm long/tall.
Basal leaves virtually absent; stem leaves linear to oblong, entire, 2-6.5 cm long, to 5 mm wide, lower 1-4 pairs opposite, the others alternate.
Inflorescence of terminal, coiled, elongating, loosely-flowered spikes, often with leafy bracts on the lower part; flowers small; petals white, fused at base into a tube that spreads (1-4 mm wide) at top to 5 lobes, with 5 yellow or white bulges at the throat; fruiting calyces 2-4 mm long, ascending-hairy.
Nutlets usually 4, clustered together, egg-shaped or narrowly egg-shaped, 1.5-2 mm long, more or less wrinkled and pimply and sometimes also bristly.

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 Plagiobothrys scouleri

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)
950 950 950
Slope Gradient (%)
30 30 30

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

225 225 225
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 2 2
Modal Nutrient Regime
# of field plots
 species was recorded in:
Modal BEC Zone Class

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


Habitat and Range

Moist meadows, grasslands and shrublands in the lowland, steppe and lower montane zones; frequent on S Vancouver Island and SC BC; E to MB and S to NM and OR.

SourceThe Illustrated Flora of British Columbia