Plants long-lived perennial, sometimes subshrubs; with woody caudices.
Stems 0.8–4.5 dm, lower parts with stalked, simple and 2–4-rayed trichomes, upper parts glabrous.
Basal leaves narrowly oblanceolate, 1–3 mm wide, margins entire, ciliate proximally with simple trichomes to 1 mm, surfaces moderately to sparsely pubescent with simple and stalked, 2–4-rayed trichomes.
Cauline leaves 3–17(30), rarely concealing stem, bases auriculate, uppermost glabrous.
Inflorescences 6–20(35)-flowered; fruiting pedicels divaricate-ascending to horizontal, straight, 10–18 mm, glabrous or with few appressed, branched trichomes.
Flowers sexual, ascending at anthesis; sepals pubescent; petals 8–12 × 2.5–4 mm, purple to magenta; pollen ellipsoid; ovules 58–94 per ovary, styles 0.05–0.2 mm.
Fruits divaricate-ascending to widely pendent, not appressed to rachis, not secund, curved or rarely straight, 5–7.5 cm × 1.8–2.5 mm, margins parallel, glabrous.
Seeds uniseriate, 1.3–1.8 × 1.2–1.5 mm; wings continuous, 0.1–0.2 mm wide.
Serpentine and limestone outcrops. Flowering Mar–Jun. 100–1300 m. Sisk. CA. Native.
as described under Boechera koehleri
Perennials; long-lived; sexual; caudex woody (with persistent, peg-like leaf bases). Stems usually 1 per caudex branch, arising from center of rosette, elevated above ground surface on woody base, 0.8-4.5 dm, pubescent proximally, trichomes stalked, 2-4-rayed, to 0.5 mm, mixed with simple ones, to 1 mm, glabrous distally. Basal leaves: blade narrowly oblanceolate, 1-3 mm wide, margins entire, ciliate proximally, trichomes (simple), to 1 mm, surfaces moderately to sparsely pubescent, trichomes stalked, 2-4-rayed, 0.1-0.3(-0.5) mm. Cauline leaves: 3-17(-30), rarely concealing stem; blade auricles 0.5-2.5 mm, surfaces of distalmost leaves glabrous. Racemes 6-20(-35)-flowered, usually unbranched. Fruiting pedicels divaricate-ascending to horizontal, straight, 10-18 mm, glabrous or sparsely pubescent, trichomes spreading, simple and 2-rayed. Flowers ascending at anthesis; sepals pubescent; petals deep purple to magenta, 8-12 × 2.5-4 mm, glabrous; pollen ellipsoid. Fruits divaricate-ascending to widely pendent, not appressed to rachis, not secund, usually curved, rarely straight, edges parallel, 5-7.5 cm × 1.8-2.5 mm; valves glabrous; ovules 58-94 per ovary; style 0.05-0.2 mm. Seeds uniseriate, 1.3-1.8 × 1.2-1.5 mm; wing continuous, 0.1-0.2 mm wide.Flowering Apr-May. Serpentine and limestone outcrops; 100-500 m; Calif., Oreg.Boechera koehleri var. koehlerei is in the Center for Plant Conservation´s National Collection of Endangered Plants.