26. Boechera evadens Windham & Al-Shehbaz, Harvard Pap. Bot. 11: 66. 2006. TYPE: United States, California, Tulare Co., occasional to common on a small rocky metamorphic outcrop adjacent to the Sherman Pass, Blackrock Forest Service road approx. 1 mile west of Bald Mtn., 8480 ft, 4 Jul 1977, J. R. Shevock 5602 (holotype, CAS!).
Plants long-lived, cespitose perennials, with woody caudices, lacking crowded, persistent leaf bases; sexual, with ellipsoid pollen. Stems usually 1 per caudex branch, arising near ground surface from center of basal rosettes, 1–2.5 dm, lower parts with abundant, short-stalked, 2–5-rayed trichomes 0.2–0.6 mm and a few simple trichomes to 1 mm, upper parts glabrous. Leaves at stem bases narrowly oblanceolate, 1.5–3.0 mm wide, entire, ciliate along petioles with simple trichomes to 1 mm, blade surfaces densely pubescent with short-stalked, 4–8-rayed trichomes 0.1–0.2 mm; cauline leaves 3–5, not concealing stem, the uppermost pubescent, with auricles 0.5–1 mm. Inflorescences unbranched, 10–22-flowered; fruiting pedicels 4–8 mm, divaricate-ascending, straight, with few appressed, branched trichomes. Flowers ascending at anthesis; sepals pubescent; petals white, 3–4 ´ 0.5–0.8 mm, glabrous; ovules 46–52 per fruit. Fruits 3–4 cm ´ 1.2–1.5 mm, divaricate-ascending, not appressed to rachises, not secund, straight, with parallel edges, glabrous; style ca. 0.1 mm. Seeds uniseriate, 1.0–1.1 ´ 0.9–1.0 mm; wing continuous, ca. 0.1 mm wide.
Habitat: rock outcrops.
Elevation: ca. 2600 m.
Distribution: United States (California/Tulare County).
Notes: known only from the holotype specimen.
Reproductive mode: sexual diploid.