Page authors: Don Knoke, David Giblin
Thysanocarpus curvipes
sand fringepod, lacepod

Distribution: Chiefly east of the Cascades in Washington; British Columbia south to California, east to Idaho.

Habitat: Uncommon on dry, open hillsides and borders of woodlands.

Flowers: April-June

Origin: Native

Conservation Status: Not of concern


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.

Accepted Name:
Thysanocarpus curvipes Hook.
Publication: Fl. Bor.-Amer. 1: 69, plate 18, fig. A. 1830. 1830.

Synonyms & Misapplications:
Thysanocarpus curvipes Hook. var. elegans (Fisch. & C.A. Mey.) B.L. Rob. [Peck]
Thysanocarpus curvipes Hook. var. longistylus Jeps. [Abrams]
Additional Resources:

PNW Herbaria: Specimen records of Thysanocarpus curvipes in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Thysanocarpus curvipes checklist entry.

E-Flora BC: Thysanocarpus curvipes atlas page.

CalPhotos: Thysanocarpus curvipes photos.

USDA Plants: Thysanocarpus curvipes information.

29 photographs:
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