Pilosella officinarum F.W. Schultz & Schultz Bipontinus
mouse-ear hawkweed
Asteraceae (Aster family)

Introduction to Vascular Plants


© Jamie Fenneman     (Photo ID #17005)


E-Flora BC Static Map

Distribution of Pilosella officinarum
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Species Information

Perennial herb from a short, stout rhizome, stolons present; stolons mat-forming; stems erect, sticky-hairy or somewhat woolly-hairy, exuding milky juice when broken, 25-40 cm tall.
All or mostly basal, well-developed, persistent, tawny-woolly above, densely hairy beneath, the hairs starlike, 2-13 cm long, 0.6-2 cm wide; stem leaves lacking or 1-many, reduced upwards, narrowly elliptic, entire or nearly so; leaves of the stolons similar but smaller.
Heads with strap-shaped flowers, solitary or rarely 2; involucres 7-11 mm tall; involucral bracts linear-lanceolate, short, coarsely hairy with black, sometimes gland-tipped hairs and occasionally long, bristly hairs; ray flowers yellow, the outer ones often with a reddish tinge on the outer surface.
Achenes ribbed, narrowed at the base, 1.5-2 mm long; pappus tawny.

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.

Habitat and Range

Dry roadsides, lawns and waste places in the lowland, steppe and montane zones; rare in S BC; introduced from Europe.

SourceThe Illustrated Flora of British Columbia


Synonyms and Alternate Names:
Hieracium pilosella L.