25. Boechera elkoensis Windham & Al-Shehbaz, Harvard Pap. Bot. 11: 263. 2007. TYPE: United States, Nevada, Elko Co., on slope overlooking Island Lake in the Ruby Mts., ca. 2.71 km NE of the summit (11,215 ft [3399 m]) of Mt. Fitzgerald, Humboldt National Forest, 40˚37'01" N, 115˚22'56" W, in rocky granitic soil on SE-facing slope, 9850 ft [2985 m], 14 Jul 1999, M. D. Windham & M. K. Windham 99-274 (holotype, UT!; isotypes, DUKE!, MO!).
Plants mostly long-lived perennials often with woody caudices, lacking crowded, persistent leaf bases; apomictic, with spheroid pollen. Stems 1–5 per caudex branch, arising near ground surface from margin or center of basal rosettes, 1–3 dm, lower parts with few, subsessile, 2–5-rayed trichomes 0.1–0.4 mm, upper parts glabrous or very sparsely pubescent. Leaves at stem bases narrowly oblanceolate, 2–6 mm wide, entire, ciliate at petiole bases with simple trichomes to 0.4 mm, blade surfaces moderately pubescent with sessile or subsessile, 2–5-rayed trichomes 0.1–0.4 mm; cauline leaves 3–6, not concealing stem, the uppermost glabrous or sparsely pubescent along margins, with auricles 0.2–0.5 mm or rarely lacking. Inflorescences unbranched, 4–11-flowered; fruiting pedicels 4–8 mm, erect to ascending, straight, glabrous or rarely with a few appressed, branched trichomes. Flowers erect to ascending at anthesis; sepals glabrous; petals lavender or rarely whitish, 4–7 ´ 1.2–2.0 mm, glabrous; ovules 26–42 per fruit. Fruits 3–7 cm ´ 2–3 mm, erect to ascending, often appressed to rachises, not secund, straight, often with slightly undulate (non-parallel) edges, glabrous; style 0.05–0.03 mm. Seeds uniseriate, 2.5–3.5 ´ 1.8–2.5 mm; wing continuous, 0.4–0.9 mm wide.
Habitat: gravelly soil among rocks in open forests and subalpine meadows.
Elevation: 2050–3150 m.
Distribution: United States (California, Nevada).
Reproductive mode: apomictic triploid.