7. Thelypodium laciniatum (W. J. Hooker) Endlicher in Walpers, Repert. Bot. Syst. 1: 171. 1842; Macropodium laciniatum W. J. Hooker, Bot. Miscell. 1: 341. 1830; Pachypodium laciniatum (W. J. Hooker) Nuttall in Torrey & A. Gray, Fl. N. Amer. 1: 96. 1838. TYPE: United States, “common on dry rocks about Wallawallah, and at Priest’s Rapid on the Columbia,” D. Douglas s.n. (holotype, K!).  

Thelypodium leptosepalum Rydberg, Bull. Torrey Bot. Club 34: 433. 1907. TYPE: United States, Idaho, Nex Perce Co., Lewiston, 6 may 1896, A. A. Heller & E. G. Heller 3022 (holotype, NY!; isotypes MO!, NDG!, UC!, US!).

Thelypodium streptanthoides Leiberg ex Piper, Contr. U.S. Natl. Herb. 11: 299. 1906; T. laciniatum var. streptanthoides (Leiberg) Payson, Ann. Missouri Bot. Gard. 9: 274. 1923. TYPE: United States, Washington, Douglas Co., near Wilson Creek, 680 m, 19 June 1893, J. H. Sandberg & J. B. Leiberg 229 (holotype, US!; isotypes, MO!, UC!).  

Herbs, biennial, glabrous throughout. Stems (1.3–)2.6–10(–14.5) dm, erect, branched below and/or above, solid, somewhat glaucous. Basal leaves and lower cauline ones with petiole (1–)1.5–10(–15) cm, not ciliate; blade lanceolate to deltoid-lanceolate or oblong to ovate in outline, pinnately lobed or laciniate, (4.3–)6.8–24(–45) x (1–)1.8–8.5(–14) cm; lateral lobes oblong to ovate, sinuate, laciniate, dentate, or lobed; middle and upper cauline leaves petiolate, lanceolate to linear-lanceolate, entire or sinuate to laciniate. Racemes densely flowered, slightly elongated in fruit, to 9.5 dm; flower buds narrowly oblong; fruiting pedicels horizontal to rarely divaricate, often stout, straight, (2–)3–6.5(–15) mm. Sepals oblong to linear-oblong, erect, (3.5–)4–7.5(–9.5) x (0.8–)1–2(–2.5) mm; petals white or purple, linear or sometimes linear-lanceolate, (6–)8.5–18(–20) x 0.3–0.8(–1.5) mm, slightly crisped, strongly differentiated into blade and claw; claw (2.5–)3–6(–7) mm, widest at base; filaments subequal, (4.5–)6.5–12(–15) mm; anthers linear, 2–4(–5.5) mm, circinately coiled, exserted, apiculate; nectar glands confluent, lateral and median; ovules 56–108 per ovary. Fruits (2.5–)3.5–10(–12) cm x (0.7–)1–1.5(–2) mm, divaricate-ascending to slightly reflexed, terete, somewhat tortuous, torulose; gynophore (0.5–)1–5(–8.5) mm; style mostly cylindrical or rarely subclavate, (0.3–)0.7–2.5(–4) mm; stigma entire. Seeds (0.7–)1–1.5(–1.8) x 0.5–0.7(–1) mm. 2n = 26.

Flowering: Apr–Aug.

Habitat: rock crevices, cliffs, rocky outcrops, among boulders, serpentine rock and talus, canyon walls, limestone ledges.

Elevation: 0–2400 m.

Distribution: Canada (S British Columbia), United States (N and E California, W Idaho, N and W Nevada, C and E Oregon, Washington).