9. Streptanthus campestris S. Watson, Proc. Amer. Acad. Arts 25: 125. 1890. TYPE: United States, California: San Diego Co., near Campo, June 1880, S. B. & W. F. Parish 449 (lectotype here designated, GH!).
Herbs, short-lived perennial, without elevated woody caudex, glabrous throughout except for basal leaf margin and sometimes sepals. Stems 6–15(–18) dm, glaucous, simple to few branched. Basal leaves often rosulate, petiolate, oblanceolate to obovate, 3.5–21 cm, fleshy, dentate, teeth and petiole or all margin bristly ciliate; middle cauline leaves lanceolate to narrowly ovate, 3.5–11(–15) x 0.6–1.4 cm, sessile, auriculate to amplexicaul, entire to undulate or rarely dentate, not overlapping; upper leaves smaller in size, reduced. Racemes ebracteate, with densely clustered buds, later lax, without a terminal cluster of sterile flowers; fruiting pedicels divaricate-ascending, straight, 5–18 mm. Flowers: sepals forming campanulate calyx, purple, broadly ovate or oblong, 7–10 mm, not keeled, suberect, apically bristly or not; petals with pale yellow claws and light purple blades, 9–12 mm; blade 2–3.5 x 0.5–1 mm, not crisped; claw 6–9 mm, wider than blade; stamens tetradynamous; median filament pairs, free, 6–8 mm; lateral pair 4–6 mm; anthers of all stamens fertile, 3–4 mm. Fruits 6–14 cm x 2–3.5 mm, spreading to ascending, flattened, slightly curved to straight, not torulose; valves glabrous, with obscure midvein; gynophore 0.5–1.5 mm; replum straight; style 1–3 mm; stigma 2-lobed; ovules and seeds 50–102 per fruit. Seed oblong, 2–3 x 1.4–2 mm; wing 0.1–0.2 mm wide at seed apex.
Habitat: rocky openings in chaparral, open conifer forests, openings and after fires in chaparral-oak woodlands.
Elevation: 900–2300 m.
Distibution: Mexico (Baja California), United States (S California).