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Published In: Harvard Papers in Botany 11(2): 260. 2007. (Harvard Pap. Bot.) Name publication detail

Project Name Data (Last Modified On 7/21/2009)

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8. Boechera californica (Rollins) Windham & Al-Shehbaz, Harvard Pap. Bot. 11: 260. 2007; Arabis sparsiflora Nutt. var. californica Rollins, Rhodora 43: 402. 1941. TYPE: United States, California, San Diego County, on dry hills near Campo, 24 May 1903, LeRoy Abrams 3563 (holotype, GH!; isotypes, E!, MO!, POM!, US!).

     Plants mostly long-lived perennials, with woody caudices, lacking crowded, persistent leaf bases; apomictic, with spheroid pollen. Stems usually 1 per caudex branch, elevated above ground surface on woody bases, arising from center of basal rosettes, (2–)3.5–13 dm, lower parts with abundant, short-stalked, 2–4 rayed trichomes 0.3–0.9 mm, upper parts moderately to sparsely pubescent. Leaves at stem bases linear to oblanceolate, 3–10(–13) mm wide, entire to denticulate, ciliate on petiole with trichomes to 1.3 mm, blade surfaces densely pubescent with short-stalked, 4–8-rayed trichomes 0.2–0.5 mm; cauline leaves 12–35(–55), often concealing stem proximally, the uppermost pubescent, with auricles 1–5(–6) mm. Inflorescences mostly unbranched, 30–120-flowered; fruiting pedicels 4–20 mm, descending to horizontal, recurved or rarely straight, with appressed, 3–7-rayed trichomes. Flowers divaricate-ascending at anthesis; sepals pubescent; petals purple (rarely pinkish), 9–14 ´ 1.5–3.0 mm, glabrous or with scattered trichomes abaxially; ovules 140–180 per fruit. Fruits (6–)8–12 cm ´ 1.5–2.5 mm, widely pendent, not appressed to rachises, not secund, curved or rarely straight, with parallel edges, glabrous or with occasional scattered trichomes; style 0.05–0.30 mm. Seeds uniseriate or subbiseriate, 1.7–2 ´ 1.2–1.7 mm; wing continuous, 0.2–0.4 mm wide.

Flowering: Mar–Jun.

Habitat: rocky slopes and gravelly soil in desert chaparral and oak woodland.

Elevation: 350–2300 m.

Distribution: Mexico (Baja California), United States (California).

Reproductive mode: apomictic triploid.




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