75. Boechera pinzliae (Rollins) Al-Shehbaz, Novon 13: 388. 2003; Arabis pinzliae Rollins, Contr. Gray Herb. 212: 110. 1982. TYPE: United States, Nevada, Esmeralda Co., White Mts, bowl on NE side of Boundary Peak, nearear center of bowl, 11,200 ft, A. Pinzl 4442 (holotype, GH!; isotypes, GH!, NY!).
Plants long-lived perennial, with mostly woody caudices, lacking crowded, persistent leaf bases; apomictic, with spheroid pollen. Stems 1–3 per caudex branch, arising near ground surface from margin of basal rosettes, 0.4–1.6 dm, lower parts with abundant short-stalked, 2–5-rayed trichomes 0.05–0.2 mm, upper parts glabrous or sparsely pubescent. Leaves at stem bases linear-oblanceolate, 1–3 mm wide, entire, rarely ciliate proximally with trichomes to 0.5 mm, blade surfaces densely pubescent with short-stalked, 2–5-rayed trichomes 0.05–0.2 mm; cauline leaves 3–6, not concealing stem, the uppermost sparsely to moderately pubescent, without auricles or (rarely) to 0.3 mm. Inflorescences unbranched, 5–8-flowered; fruiting pedicels 2–6 mm, ascending to divaricate-ascending, straight, glabrous or with few appressed, branched trichomes. Flowers ascending at anthesis; sepals pubescent; petals purple, 4–5 ´ 1.0–1.5 mm, glabrous; ovules 26–34 per fruit. Fruits 2.5–4.8 cm ´ 2.5–3.2 mm, ascending to divaricate-ascending, not appressed to rachises, not secund, straight, with parallel edges, glabrous; style 0.1–0.3 mm. Seeds uniseriate, 2.5–3.5 ´ 1.5–2.5 mm; wing continuous, 0.2–0.9 mm wide.
Habitat: gravelly granitic soils in alpine and subalpine areas.
Elevation: 3000–3400 m.
Distribution: United States (California/Mono County, Nevada/Esmeralda County).
Reproductive mode: apomictic triploid.