Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Idaho, Colorado, and New Mexico.
Habitat: Uncommon on dry, open hillsides and borders of woodlands.
Flowers: April-June
Origin: Native
Growth Duration: Annual
Conservation Status: Not of concern
Pollination: Bees, flies, butterflies
Simple to freely-branched annual, the stem 1.5-8 dm. tall, glabrous above and stiff-hairy below.
Basal leaves several, oblanceolate, 1.5-5 cm. long, short-petiolate and dentate; cauline leaves alternate, smaller than the basal, oblong to narrowly lanceolate, sessile and auriculate, entire to dentate.
Inflorescence of slender, bractless racemes; pedicles almost filiform, recurved, 4-7 mm. long; sepals 4, spreading, ovate, 1 mm. long, often purplish, white-margined; petals 4, white or purplish-tinged, about equal to the sepals, narrow; stamens 6; style 0.1-0.5 mm. long.
Silicles strongly compressed, orbicular or oval, 5-8 mm. long, bordered with a broad, radiately nerved wing, glabrous or pubescent.
Publication: Fl. Bor.-Amer. 1: 69, plate 18, fig. A. 1830.
Thysanocarpus curvipes Hook. var. longistylus Jeps. [Abrams]
PNW Herbaria: Specimen records of Thysanocarpus curvipes in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Thysanocarpus curvipes checklist entry
OregonFlora: Thysanocarpus curvipes information
E-Flora BC: Thysanocarpus curvipes atlas page
CalPhotos: Thysanocarpus curvipes photos
