Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon.
Habitat: Cliffs and talus slopes.
Flowers: May-July
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bees, flies, butterflies
Perennial from a taproot, the several stems 2-7 dm. tall, 2-5 mm. thick toward the base, the lower part with spreading, stiff hairs, the upper with appressed hairs.
Basal leaves petiolate, persistent, oblanceolate or narrowly elliptic, 6-18 cm. long and 8-25 mm. wide; cauline leaves well-developed, sessile, lanceolate to lance-elliptic, 5-12 cm. long and 8-18 mm. wide.
Inflorescence of nearly naked false-racemes; calyx cleft to the base; corolla white with a yellow eye, 5-lobed, the tube slender, the limb spreading abruptly, 7-12 mm. wide; puberulent appendages opposite the corolla lobes at the top of the tube; stamens not exerted; style shorter than the nutlets.
Nutlets 4, attached to the base of the style, with marginal prickles distinct to the base; intramarginal prickles 8-30, much shorter than the marginal ones.
Publication: Contr. Gray Herb. 68: 48 1923.
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var. arida – sagebrush stickseed, steppe stickseed
Occurring east of the Cascades crest, where endemic to north-central Washington. -
var. cottonii – Cotton's stickseed Occurring east of the Cascades crest in south-central Washington; south-central Washington to north-central Oregon.
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var. diffusa – diffuse stickseed Occurring east of the Cascades crest in Washington; south-central British Columbia to north-central Oregon.
PNW Herbaria: Specimen records of Hackelia diffusa in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Hackelia diffusa checklist entry.
OregonFlora: Hackelia diffusa information.
E-Flora BC: Hackelia diffusa atlas page.
CalPhotos: Hackelia diffusa photos.
USDA Plants: Hackelia diffusa information.
