4. Streptanthus bernardinus (Greene) Parish, Pl. World 20: 216. 1917; Agianthus bernardinus Greene, Leafl. Bot. Observ. Crit. 1: 228. 1906; Streptanthus campestris S. Watson var. bernardinus (Greene) I. M. Johnston, Pl. World 22: 89. 1919. TYPE: United States, California, San Bernardino Co., San Bernardino Mts., Bear Valley, 25 June 1894, 6500 m, Samuel B. Parish 3035 (lectotype here designated, NDG; isolectotype, MO!).
Agianthus jacobaeus Greene, Leafl. Bot. Observ. Crit. 1: 229. 1906; S. campestris var. jacobaeus (Greene) Jepson, Fl. Calif. 2: 28. 1936. TYPE: United States, California, San Diego Co., Cuyamaca Mts., Jul 1889, C. R. Orcutt 1507 (holotype, US).
Herbs, perennial, with woody, often elevated, simple or few-branched caudex, glabrous throughout except for petioles and sepal apex, glaucous. Stems 2.5–8.6 dm, erect, simple or few branched. Basal leaves not rosulate, with ciliate petioles, oblanceolate to spatulate, 2–8 x 0.7–2.5 cm, remotely dentate above middle; middle cauline leaves ovate to lanceolate, 2–10 x 0.5–2.8 cm, sessile, amplexicaul, entire, acute to acuminate, not overlapping; upper leaves smaller in size, reduced. Racemes ebracteate, lax, without a terminal cluster of sterile flowers; fruiting pedicels divaricate-ascending, straight, 4–7.5 mm. Flowers: sepals forming campanulate calyx, pale yellow to white, broadly oblong to ovate, 5–9 mm, not keeled, ascending, subapically with few stiff trichomes; petals white, 7–11 mm; blade 2–4 x 1–1.3 mm, not crisped; claw white, 6–9 mm, wider than blade; stamens nearly tetradynamous; median filament pairs free, 6.5–8.5 mm; lateral pair 4.5–5.5 mm; anthers of all stamens fertile, 3.5–4.5 mm. Fruits 5–12.7 cm x 1.5–3 mm, ascending to spreading, flattened, straight or curved, not torulose; valves glabrous, with obscure midvein at least distally; gynophore 0.5–1.5 mm; replum straight; style 0.8–2.5 mm; stigma subentire; ovules and seeds 36–56 per fruit. Seeds oblong, 2–3 x 1.4–2 mm; wing 0.1–0.2 mm wide at seed apex. 2n = 28.
Habitat: dry open pine or cypress woods, chaparral.
Elevation: 1200–2500 m.
Distribution: Mexico (Baja California), United States (S California/San Bernardino and San Diego counties).