UW Burke Herbarium species comparison

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Oenothera laciniata

Oenothera cespitosa

Habit Tufted, acaulescent to short-stemmed perennial, under 2.5 dm. tall, glabrous to densely pubescent.
Leaves

Leaves basal, narrowly to broadly oblanceolate, 10-25 cm. long and 1-2.5 cm. broad, with slender petioles about equal to the blades;

blades pinnatifid to remotely toothed or nearly entire.
Flowers

Flowers sessile or with short pedicels;

calyx tube greenish or reddish, flared above, 5-12 cm. long, the 4 lobes reflexed, 2.5-3.5 cm. long;

petals 4, 2.5-4.5 cm. long, white, aging to pinkish, obcordate;

stamens 8, stigma with 4 lobes 5-8 mm. long;

ovary inferior, 4-celled.
Fruits

Capsule woody, oblong-ovoid, 1-4 cm. long, angled but not winged.

Oenothera laciniata

Oenothera cespitosa
Flowering time May-July
Habitat Talus slopes, road cuts, and dry hills.
Distribution
[WildflowerSearch map]
[BONAP county map]
Occuring sporadically throughout central and eastern Washington; widespread throughout much of western U.S. and central Canada.
[WildflowerSearch map]
Origin Native
Conservation status Sensitive in Washington (WANHP)
Sibling taxa
O. biennis, O. cespitosa, O. curtiflora, O. elata, O. flava, O. glazioviana, O. pallida, O. suffrutescens
O. biennis, O. curtiflora, O. elata, O. flava, O. glazioviana, O. pallida, O. suffrutescens
Subordinate taxa
O. cespitosa ssp. cespitosa, O. cespitosa ssp. marginata
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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