31. Boechera fendleri (S. Watson) W. A. Weber, Phytologia 51: 370. 1982; Arabis holboellii Hornemann var. fendleri S. Watson in A. Gray & Watson, Syn. Fl. N. Amer. 1(1): 164. 1895; A. fendleri (S. Watson) Greene, Pittonia 3: 156. 1897. TYPE: United States, New Mexico, from Santa Fe E to Rabbit Ear Creek, 10-20 Aug 1847, A. Fendler 27 (lectotype by Greene (Pittonia 3: 156, 1897), GH!; isotype, MO!, NY!, UC!, US!).
Plants short- to long-lived perennials, with mostly non-woody caudices, occasionally with crowded, persistent leaf bases; sexual, with ellipsoid pollen. Stems 1–7 per caudex branch, arising near ground surface from center of basal rosettes or laterally below sterile shoots, 1.5–5.5(–8) dm, lower parts with many simple and long-stalked, 2-rayed trichomes 0.2–0.9 mm, upper parts glabrous. Leaves at stem bases broadly oblanceolate, 5–15(–20) mm wide, dentate, ciliate with simple trichomes to 1.2 mm, blade surfaces glabrous or pubescent with simple and long-stalked, 2-rayed (rarely a few 3-rayed) trichomes 0.2–0.6 mm; cauline leaves 8–25, often concealing stem proximally, the uppermost often glabrous, with auricles 0.8–3 mm. Inflorescences mostly unbranched, 6–40(–74)-flowered; fruiting pedicels 9–18(–23) mm, horizontal to divaricate-ascending, curved or angled downward, glabrous or very rarely with a few spreading, simple trichomes. Flowers ascending at anthesis; sepals sparsely hirsute; petals lavender or rarely white, 5–9 ´ 1–2 mm; ovules 98–128 per fruit. Fruits 3.0–5.8 cm ´ 1.5–2.0 mm, widely pendent, not appressed to rachises, not secund, curved to nearly straight, with parallel edges, glabrous; style 0.2–0.5 mm. Seeds biseriate, 0.9–1.2 ´ 0.6–0.8 mm; wing distal (occasionally absent), 0.05–0.15 mm wide. 2n = 14.
Habitat: rocky slopes in pine forests, pinyon-juniper woodlands, and scrub oak.
Elevation: 1800–2800 m.
Distribution: United States (Arizona, Colorado, New Mexico, Nevada, Utah).
Reproductive mode: sexual diploid.