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

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

Introduction to Vascular Plants

© Val George  Email the photographer   (Photo ID #26458)

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Distribution of Plagiobothrys scouleri
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Species Information

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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.

Source: The Illustrated Flora of British Columbia

Habitat / 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.

Source: The Illustrated Flora of British Columbia


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
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: PP(1)


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.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References