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FNA | Family List | FNA Vol. 7 | Brassicaceae | Boechera

95. Boechera shevockii Windham & Al-Shehbaz, Harvard Pap. Bot. 11: 82. 2006.

Perennials; long-lived; (pul-vinate); sexual; caudex woody (with persistent, crowded leaf bases). Stems 1 per caudex branch, arising from center of rosette near ground surface, 0.5-1 dm, puberulent proximally, trichomes (scattered), simple, 0.02-0.1 mm, similarly pubescent distally. Basal leaves: blade oblong-oblanceolate, 1-2 mm wide, margins entire, ciliate distally, trichomes (simple), 0.02-0.1 mm, surfaces glabrous. Cauline leaves: 3-7, not concealing stem; blade auricles absent, surfaces of distalmost leaves glabrous. Racemes 4-7-flowered, unbranched. Fruiting pedicels ascending, straight, 5-9 mm, glabrous. Flowers ascending at anthesis; sepals glabrous; petals lavender, 4-5 × 1-1.2 mm, glabrous; pollen ellipsoid. Fruits ascending, not appressed to rachis, not secund, straight, edges parallel, 2.5-3 cm × 1-1.5 mm; valves glabrous; ovules 30-34 per ovary; style ca. 0.5 mm. Seeds uniseriate, ca. 1.2 × 0.8 mm; wing distal or continuous, ca. 0.1 mm wide.

Flowering Jun. Ledges of rock outcrops; ca. 2500 m; Calif.

Boechera shevockii is a close relative of B. davidsonii, from which it is readily distinguished by having puberulent (versus glabrous) stems, shorter (4-5 versus 6-10 mm) petals, and much shorter (5-7 versus 30-80 mm) basal leaves. It is known only from the type specimen, from the southern Sierra Nevada in Tulare County.


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