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

Oenothera perennis L.
perennial sundrops (little evening-primrose)
Onagraceae (Evening Primrose family)

Introduction to Vascular Plants
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Distribution of Oenothera perennis
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Species Information

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General:
Perennial herb from a slender taproot; stems erect, simple or branched, finely hairy, 20-60 cm tall.
Leaves:
Oblong to oblong-lanceolate, 2.5-5 cm long, essentially entire, fine appressed-hairy to nearly glabrous; short-stalked.
Flowers:
Inflorescence in short, leafy-bracted, glandular-hairy, few-flowered, terminal spikes, the axis and tip drooping in bud, eventually straightening, opening in morning; hypanthium 2-4 mm long; petals heart-shaped, 4-8 mm long, yellow; sepals often reddish, linear lanceolate, 5-8 mm long, bent back.
Fruits:
Capsules, club-shaped, 1-2 cm long, erect, glabrous, somewhat wing-angled; unstalked or short-stalked.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic grassy places and forest edges in the montane zone; rare in SE BC, known recently only from Moyie Lake; introduced from E North America.

Source: The Illustrated Flora of British Columbia

Climate

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.

Synonyms and Alternate Names

Kneiffia perennis (L.) Pennell
Kneiffia pumila (L.) Spach
Oenothera perennis var. rectipilis (S.F. Blake) S.F. Blake
Oenothera perennis var. typica Munz

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References