97. Boechera shockleyi (Munz) Dorn, Brittonia 55: 3. 2003; Arabis shockleyi Munz, Bull. S. Calif. Acad. Sci. 31: 62. 1932. TYPE: United States, Nevada, Esmeralda Co., Mellin Mt., near Candelaria, May 1884, W. H. Shockley 366 (holotype, GH!; isotypes, JEPS!, NDG!, US!).

     Plants mostly short-lived perennials, with non-woody caudices, rarely with crowded, persistent leaf bases; sexual, with ellipsoid pollen. Stems usually 1 per caudex branch, arising near ground surface from center of basal rosettes, (0.8–)2.0–5.0 dm, lower parts with abundant short-stalked, 7–12-rayed trichomes 0.1–0.2 mm, upper parts densely to sparsely pubescent. Leaves at stem bases oblanceolate, 3–10 mm wide, entire, not ciliate, blade surfaces densely pubescent with short-stalked, 7–12-rayed trichomes 0.1–0.2 mm; cauline leaves 14–60, concealing stem for most of length, the uppermost densely pubescent, with auricles 0.5–4.0 mm. Inflorescences mostly unbranched, 20–70-flowered; fruiting pedicels 7–28 mm, divaricate-ascending, straight, with appressed, branched trichomes. Flowers ascending at anthesis; sepals pubescent; petals lavender, 6–9 ´ 0.8–1.2 mm, glabrous; ovules 140–190 per fruit. Fruits 4.5–11.0 cm ´ 1.5–2.0 mm, divaricate-ascending, not appressed to rachises, not secund, curved or rarely straight, with parallel edges, glabrous to sparsely pubescent throughout; style 0.05–0.60 mm. Seeds subbiseriate, 1.0–1.3 ´ 0.7–0.8 mm; wing distal, 0.05–0.10 mm wide or rarely absent.

Flowering: Apr–May.

Habitat: rock outcrops (primarily dolomite) and gravelly soil in desert scrub, sagebrush, and pinyon-juniper woodland.

Elevation: 1200–2200 m.

Distribution: United States (California, Nevada, Utah).

Reproductive mode: sexual diploid.