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

Oenothera villosa subsp. strigosa Thunb. (Rydb.) W. Dietr. & P.H. Raven
yellow evening-primrose (hairy evening-primrose)
Onagraceae (Evening Primrose family)

Introduction to Vascular Plants

Photograph

Currently no image is available for this taxon.

Map

Distribution of Oenothera villosa subsp. strigosa
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Species Information

General:
Biennial herb from a stout taproot; forming rosette in first year and an erect, stiff stem in second; greyish stiff-hairy, also with spreading hairs from red blister-like bases; stems 50-200 cm tall, simple or branched.

Leaves:
Stem leaves alternate, ascending or spreading, lanceolate or elliptic, 10-30 cm long, entire to minutely-toothed, hairy.

Flowers:
Inflorescence a few-flowered, open spike, glandular, buds erect, opening in the evening, subtended by large bracts or reduced leaves; hypanthium 2.5-4 cm long; petals yellow, fading duller or pale orange, 0.7-2 cm long; sepals 0.9-1.8 cm long, often marked reddish, bent back when in flower, the free tips in bud 0.5-2.5 mm long.

Fruits:
Capsules, erect, narrowly lanceolate, 2-3.5 cm long, 4-7 mm wide, more or less straight, 4-chambered, hairy; seeds 1-2 mm long, angled, irregularly pitted.

Source: The Illustrated Flora of British Columbia

Illustration

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.

Illustration Source: The Illustrated Flora of British Columbia

Habitat and Range

Dry shrubland, roadsides and disturbed areas in the lowland and steppe zones; infrequent in C and S BC east of the Coast-Cascade Mountains, rare along the coast, where probably introduced; E to ON and S to MI, WI, NE, NM, AZ and CA.

Source: The Illustrated Flora of British Columbia

Status Information

Scientific Name	Origin Status	Provincial Status	BC List (Red Blue List)	COSEWIC
Oenothera villosa ssp. strigosa	Native	S5	Yellow	Not Listed
Oenothera villosa ssp. villosa	Exotic	SNA	Exotic	Not Listed

BC Ministry of Environment: BC Species and Ecosystems Explorer.

Synonyms

Synonyms and Alternate Names:
Oenothera biennis var. strigosa (Rydb.) Piper
Oenothera cheradophila Bartlett
Oenothera depressa subsp. strigosa (Rydb.) Roy L. Taylor & MacBryde
Oenothera procera Woot. & Standl.
Oenothera rydbergii House
Oenothera strigosa (Rydb.) Mack. & Bush
Oenothera strigosa subsp. cheradophila (Bartlett) Munz
Oenothera villosa subsp. cheradophila (Bartlett) W. Dietr. & Raven
Oenothera villosa var. strigosa (Rydb.) Dorn