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Boechera formosa (Greene) Windham & Al-Shehbaz Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical Garden Decrease font Increase font Restore font
 

Published In: Harvard Papers in Botany 11(1): 68. 2006. (Harvard Pap. Bot.) Name publication detail
 

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

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33. Boechera formosa (Greene) Windham & Al-Shehbaz, Harvard Pap. Bot. 11: 68. 2006; Arabis formosa Greene, Pittonia 4: 198. 1900. TYPE: United States, New Mexico, San Juan County, hills about Aztec, 5500 ft, 28 Apr 1899, C. F. Baker 345 (holotype, NDG!; isotypes, E!, GH!, K!, MO!, 2NDG!, NY!, 2RM!, RSA!, UC!, US!).

Arabis pulchra M. E. Jones ex S. Watson var. pallens M. E. Jones, Contr. W. Bot. 14: 42. 1912; Boechera pulchra (M. E. Jones ex S. Watson) W. A. Weber subsp. pallens (M. E. Jones) W. A. Weber, Phytologia 51: 371. 1982. B. pulchra var. pallens (M. E. Jones) Dorn, Vasc. Pl. Wyoming, ed. 3. 376. 2001. TYPE: United States, Colorado, Mesa Co., Westwater, 6 May 1891, M. E. Jones s.n. (lectotype, designated by Rollins (1941: 460), POM!; isolectotypes, GH!, MO!, NY!, ORE!, US!).

     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 leaf tuft, 2.0–5.5 dm, lower parts with abundant, short-stalked, 4–7-rayed trichomes 0.1–0.4 mm, upper parts similarly pubescent. Leaves at stem bases linear to linear-oblanceolate, 2–3(–4) mm wide, entire, occasionally ciliate near petiole base with simple or 2-rayed trichomes to 0.8 mm, blade surfaces densely pubescent with short-stalked, 4–8-rayed trichomes 0.1–0.3 mm; cauline leaves 7–18, concealing stem proximally, the uppermost densely pubescent, lacking auricles. Inflorescences mostly unbranched, 6–26-flowered; fruiting pedicels 5–10(–20) mm, horizontal to descending, usually recurved, with appressed, branched trichomes. Flowers divaricate at anthesis; sepals pubescent; petals white to pale lavender, 8–18 ´ 2.5–4.4(–5.5) mm, glabrous; ovules 72–98 per fruit. Fruits 4.3–7.0 cm ´ 1.6–3.0 mm, divaricate-descending to reflexed, usually not appressed to rachises, rarely somewhat secund, straight, with parallel edges, pubescent throughout; style ca. 0.1 mm. Seeds biseriate, 1.2–1.6 ´ 1.0–1.2 mm; wing continuous, 0.1–0.2 mm wide. 2n = 14.

Flowering: Apr–Jun.

Habitat: rocky slopes and sandy soil in blackbrush, sagebrush, and pinyon-juniper communities.

Elevation: 1300–1900 m.

Distribution: United States (Arizona, Colorado, New Mexico, Utah, Wyoming).

Reproductive mode: sexual diploid

 

 
 


 

 
 
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