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

Oenothera pallida Lindl. subsp. pallida
pale evening-primrose
Onagraceae (Evening Primrose family)

Introduction to Vascular Plants
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Distribution of Oenothera pallida subsp. pallida
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Species Information

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General:
Perennial herb from a rhizome; stems very leafy, 10-50 cm tall, simple to branched at base; glabrous to greyish-stiff-hairy, whitish bark peeling.
Leaves:
Linear to linear lanceolate, 2-6 cm long, mostly less than 5 (10) mm wide, entire to sharp-toothed, sometimes with 1 or more conspicuous toothlike lobes near base; gradually narrowed to stalks, 5-15 mm long.
Flowers:
Inflorescence of several to many, long-stalked, fragrant flowers in very leafy spikes, the buds nodding, opening in the evening; hypanthium 1.5-3.5 cm long, usually pink to purplish, glabrous to stiff-hairy, not glandular; petals egg-shaped, 1.5-3 cm long, tips rounded to notched, white, aging pinkish; sepals 1-2 cm long, mostly joined and turned to one side in flower; stamens about equalling petals in length, the anthers 6-10 mm long; styles about equalling the petals in length; stigma lobes 4, linear, 4-6 mm long.
Fruits:
Capsules, linear, 2-3 mm thick at the base, tapered to tip, usually arched upward, 1.5-3.5 cm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry sandy slopes and banks in the steppe zone; infrequent in S BC east of the Coast-Cascade Mountains; S to ID, AZ and NM.

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

Oenothera pallida var. idahoensis Munz
Oenothera pallida var. typica Munz

Taxonomic and Nomenclatural Links

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General References