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Boechera pauciflora (Nutt.) 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(2): 268. 2007. (Harvard Pap. Bot.) Name publication detail
 

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

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67. Boechera pauciflora (Nuttall) Windham & Al-Shehbaz, Harvard Pap. Bot. 11: 268. 2007; Sisymbrium pauciflorum Nuttall in Torrey & A. Gray, Fl. N. Amer. 1: 93. 1838. TYPE: United States, Rocky Mts., T. Nuttall s.n. (holotype, BM!; isotype, PH!).

Arabis arcuata (Nuttall) A. Gray var. subvillosa S. Watson in A. Gray & S. Watson, Syn. Fl. N. Amer. 1(1): 164. 1895; A. sparsiflora Nuttall var. subvillosa (S. Watson) Rollins, Rhodora 43: 403. 1941; Boechera sparsiflora (Nuttall) Dorn var. subvillosa (S. Watson) Dorn, Vasc. Pl. Wyoming, ed. 3. 376. 2001. TYPE: United States, Washington, Whitman Co., Pullman, 20 May 1894, C. V. Piper 1812 (lectotype designated by Rollins (1941: 404), GH!; isotype, US!).

Arabis elegans A. Nelson, Bot. Gaz. 30: 192. 1900, not A. elegans Tineo ex Lojacono, Fl. Sicula 1: 106. 1886; A. perelegans A. Nelson in J. M. Coulter & A. Nelson, New Man. Bot. Centr. Rocky Mts. 228. 1909. TYPE: United States, Wyoming. [Park Co.:] Yellowstone National Park, Undine Falls, partly shaded slopes, 6 Jul 1897, Aven Nelson & Elias Nelson 5676 (lectotype designated by Windham & Al-Shehbaz (2007: 268), RM!; isolectotypes, E!, MO!).

     Plants short- to long-lived perennials, occasionally with woody caudices, lacking crowded, persistent leaf bases; apomictic, with spheroid pollen. Stems usually 1 per caudex branch, arising near ground surface from center of basal rosettes, (1.4–)3.0–11.2 dm, lower parts with abundant simple trichomes 0.6–1.5 mm mixed with stalked, 2(or 3)-rayed trichomes 0.2–0.4 mm, upper parts sparsely pubescent. Leaves at stem bases oblanceolate, 3–10 mm wide, dentate or rarely entire, occasionally ciliate with simple or branched trichomes to 1 mm, blade surfaces densely pubescent with stalked, 2–5-rayed trichomes 0.3–0.6 mm; cauline leaves (8–)14–60, often concealing stem proximally, the uppermost glabrous or sparsely pubescent, with auricles (1–)3–10 mm. Inflorescences mostly unbranched, 17–60-flowered; fruiting pedicels 4–13 mm, horizontal to divaricate-descending, straight or rarely slightly recurved, with spreading 2–3-rayed trichomes. Flowers divaricate at anthesis; sepals pubescent; petals lavender to whitish, 5–8 ´ 1–2 mm, glabrous; ovules 80–162 per fruit. Fruits 5.5–10.5 cm ´ 1.5–2.2 mm, horizontal, divaricate-descending or widely pendent, not appressed to rachises, not secund, curved, with parallel edges, glabrous; style 0.05–0.50 mm. Seeds uniseriate, 1.4–1.8 ´ 1.0–1.4 mm; wing continuous, 0.10–0.25 mm wide. 2n = 21.

Flowering: May–Jun.

Habitat: rocky soil in sagebrush areas, mountain shrub communities, and edges of conifer forests. Elevation: 600–2500 m.

Distribution: Canada (British Columbia), United Sates (California, Idaho, Montana, Nevada, Oregon, Utah, Washington, Wyoming).

Reproductive mode: apomictic triploid.

 

 
 


 

 
 
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