53. Boechera lasiocarpa (Rollins) Dorn, Brittonia 55: 3. 2003; Arabis lasiocarpa Rollins, Syst. Bot. 6: 58. 1981. TYPE: United States, Utah, Rich Co., 6 mi. W of Garden City, off U.S. Hwy. 89, Wasatch Range, high ridge, sedimentary rock, 22 Jun 1979, R. C. & K. W. Rollins 79307 (holotype, GH!; isotypes, 2BRY!, 2MO!, 2NY!, RM!, UC!, US!).

     Plants long-lived perennials, often with woody caudices, lacking crowded, persistent leaf bases; sexual, with ellipsoid pollen. Stems 1 or few per caudex branch, somewhat elevated on woody bases or arising near ground surface from center or margin of basal rosettes, (0.7–)2.0–3.5 dm, lower parts with abundant short-stalked, 4–8-rayed trichomes 0.05–0.15 mm, upper parts moderately to sparsely pubescent. Leaves at stem bases narrowly oblanceolate, 2–5 mm wide, entire, not ciliate, blade surfaces densely pubescent with short-stalked, 4–8-rayed trichomes 0.05–0.15 mm; cauline leaves 4–10, often concealing stem proximally, the uppermost sparsely to moderately pubescent, lacking auricles. Inflorescences mostly unbranched, 5–12-flowered; fruiting pedicels 4–14 mm, descending, recurved, with appressed, branched trichomes. Flowers divaricate at anthesis; sepals pubescent; petals purple to lavender, 6–10 ´ 1.5–2.5 mm, glabrous; ovules 26–36 per fruit. Fruits 2–5 cm ´ 1.7–2.2 mm, pendent, usually not appressed to rachises, rarely secund, straight or curved, glabrous or pubescent throughout; style 0.2–0.9 mm. Seeds uniseriate, 1.5–2.0 ´ 1.0–1.5 mm; wing distal or continuous, 0.1–0.2 mm wide.

Flowering: May–Jun.

Habitat: rocky ridges and slopes with dwarf sagebrush.

Elevation: 1850–2800 m.

Distribution: United States (Utah).

Reproductive mode: sexual diploid.