20. Boechera depauperata (A. Nelson & P. B. Kennedy) Windham & Al-Shehbaz, Harvard Pap. Bot. 11: 262. 2007; Arabis depauperata A. Nelson & P. B. Kennedy, Proc. Biol. Soc. Wash. 19: 36. 1906; A. lemmonii S. Watson var. depauperata (A. Nelson & P. B. Kennedy) Rollins, Madroño 3: 360. 1936. TYPE: United States, Nevada. Washoe Co.: summit of Mt. Rose, 10,800 ft [3273 m], 17 Aug 1905, P. B. Kennedy 1167 (holotype, RM; isotypes, GH, UC).
Plants mostly long-lived, cespitose perennials, with woody caudices; lacking crowded, persistent leaf bases; apomictic, with spheroid pollen. Stems usually 1 per caudex branch, arising near ground surface from center of basal rosettes, 0.5–1.5(–2.0) dm, lower parts with abundant, short-stalked, 4–8-rayed trichomes 0.07–0.4 mm, upper parts sparsely pubescent or rarely glabrous. Leaves at stem bases narrowly oblanceolate, 0.7–3(–5) mm wide, entire, occasionally ciliate proximally with trichomes to 0.4 mm, blade surfaces densely pubescent with short-stalked, 5–8-rayed trichomes 0.05–0.25 mm; cauline leaves 3–7, not concealing stem, the uppermost pubescent or rarely glabrous, with auricles 0.5–1.5 mm. Inflorescences unbranched, 9–23-flowered; fruiting pedicels 1.5–7 mm, divaricate-ascending, straight, with appressed, branched trichomes or rarely glabrous. Flowers ascending at anthesis; sepals pubescent; petals lavender to purplish, 3.5–5.0 ´ 0.8–1.2 mm, glabrous; ovules 32–44 per fruit. Fruits 1.7–3.5(–4.5) cm ´ 1.0–1.5 mm, divaricate-ascending, not appressed to rachises, not secund, straight, with parallel edges, glabrous; style 0.05–0.20 mm. Seeds uniseriate, 1.2–1.5 ´ 1.0–1.2 mm; wing continuous, 0.10–0.15 mm wide.
Habitat: exposed ridges and talus slopes in subalpine and alpine habitats.
Elevation: 2650–3900 m.
Distribution: United States (California, Nevada).
Reproductive mode: apomictic triploid.