14. Boechera constancei (Rollins) Al-Shehbaz, Novon 13: 384. 2003; Arabis constancei Rollins, Contr. Gray Herb. 201: 5. 1971. TYPE: United States, California, Plumas Co., 7.6 mi. SE of Quincy (at Spring Garden overpass) on road to Blairsden, near rocks on open serpentine, WSW facing gentle slope, 4100 ft., 11 Jul 1969, L. Constance & T. I. Chuang 3875 (holotype, GH!; isotype, UC!).
Arabis suffrutescens S. Watson var. perstylosa Rollins. TYPE: United States, California, Plumas Co., above the Middle Fork of the Feather River, 7.3 miles SE Quincy, 4000 ft, 9 Jun 1938, L. Constance 2309 (holotype, GH!; isotypes, DS!, NY!, UC!, WS!).
Plants long-lived perennials, with woody caudices, lacking crowded, persistent leaf bases; sexual, with ellipsoid pollen. Stems usually 1 per caudex branch, elevated above ground surface on woody bases, arising from center of basal rosettes, 1.2–3.0 dm, glabrous throughout. Leaves at stem bases narrowly oblanceolate, 1.5–4.0 mm wide, entire, ciliate with simple and fewer, stalked, 2-rayed trichomes 0.3–0.8 mm, blade surfaces glabrous; cauline leaves 6–12, not concealing stem, the uppermost glabrous, lacking auricles. Inflorescences unbranched, 5–15-flowered; fruiting pedicels 4–12 mm, arched, strongly recurved proximally, glabrous. Flowers divaricate-ascending at anthesis; sepals glabrous; petals creamy white, 6–8 ´ 1.5–2 mm, glabrous; ovules 18–28 per fruit. Fruits 4.0–7.5 cm ´ 3.0–3.5 mm, pendent, not appressed to rachises, usually secund, straight or slightly curved, often with somewhat undulate (non-parallel) edges, glabrous; style 2.5–5.0 mm. Seeds uniseriate, 3–4 ´ 2.5–3 mm; wing continuous, 0.5–1.0 mm wide. 2n = 14.
Habitat: steep ridges and serpentine slopes.
Elevation: 1200–1900 m.
Distribution: United States (California/Plumas County).
Reproductive mode: sexual diploid.