UW Burke Herbarium species comparison

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Oenothera laciniata

Oenothera glazioviana

red-sepal evening-primrose
Habit Large, erect biennial, the stem with conspicuous red blotches and numerous red-based hairs.
Leaves

Leaves alternate, lanceolate, strongly crinkled, petiolate, the blades 5-10 cm. long and about 1/3 as wide, the mid-rib white.
Flowers

Flowers in elongate, bracteate spikes;

calyx tube red-striped, over 2 cm. long, the 4 lobes distinct, reflexed, 2.5-4 cm. long;

petals yellow, fading to reddish, 3-5 cm. long, slightly notched;

stamens 8;

styles longer than the stamens;

stigmas with 4 linear lobes 4-6 mm. long;

ovary inferior, 4-celled.
Fruits

Capsule tapering to the tip.

Oenothera laciniata

Oenothera glazioviana
Flowering time June-September
Habitat Disturbed soil.
Distribution
[WildflowerSearch map]
[BONAP county map]
Occurring west of the Cascades crest in Washington; British Columbia to California; also in scattered locations in the eastern U.S.
[WildflowerSearch map]
[BONAP county map]
Origin Introduced from Europe
Conservation status Not of concern
Sibling taxa
O. biennis, O. cespitosa, O. curtiflora, O. elata, O. flava, O. glazioviana, O. pallida, O. suffrutescens
O. biennis, O. cespitosa, O. curtiflora, O. elata, O. flava, O. pallida, O. suffrutescens
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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