9. Caulanthus glaucus S. Watson, Proc. Amer. Acad. Arts 17: 364. 1882; Streptanthus glaucus (S. Watson) Jepson, Man. Fl. Pl. Calif. 415. 1925. TYPE: United States, California, Esmeralda [Mineral] Co., Candelaria, 1881, W. H. Shockley [19] (holotype, GH!; isotypes, CAS!; GH!, JEPS!, MO!, NY!, UC!).

Herbs, perennial, with a woody caudex, glabrous throughout, glaucous. Stems 3–12 dm, erect or ascending, simple or branched above. Basal leaves not rosulate; petiole 1–8 cm; blade broadly obovate or oblong to elliptic, 2–10 x 2–12 cm, margin entire, rarely coarsely dentate-sinuate; uppermost cauline leaves short petiolate, lanceolate to linear, 1–3.5 x 0.3–1 cm, entire. Racemes without a terminal cluster of sterile flowers, ebracteate, densely flowered, elongated in fruit; fruiting pedicels ascending, 5–35 mm. Sepals purplish or green to yellowish green, lanceolate, 7–12 ´ 2–3 mm, erect, equal, not keeled; petals purple or yellowish green, not or faintly veined, 11–17.5 mm; blade 3–6 x 1.8–2.7 mm, not crisped; claw narrowly oblong to narrowly oblanceolate, 8–12 x 3-4 mm; filaments tetradynamous, free, median pairs 3.5–8 mm, lateral pair 2–7 mm; anthers narrowly oblong, 3.5–4.5 mm, equal; ovules 180–210 per ovary. Fruits 4.5–15.5 cm ´ 1–1.6 mm, divaricate to ascending, terete, often distinctly curved; valves obscurely veined; style 0.2–1 mm; stigma strongly 2-lobed, lobes to 0.9–1.5 mm, connivent, opposite replum. Seeds 1–2 x 0.8–1.2 mm; cotyledons entire.

Flowering: Apr–Jun.

Habitat: sagebrush scrub, dry slopes and rocky outcrops.

Elevation: 1500–2400 m.

Distribution: United States (E California, W Nevada).