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Boechera duchesnensis (Rollins) Windham, Al-Shehbaz & Allphin 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 12(1): 239. 2007. (Harvard Pap. Bot.) Name publication detail
 

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

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24. Boechera duchesnensis (Rollins) Windham, Al-Shehbaz & Allphin, Harvard Pap. Bot. 12: 239. 2007; Arabis pulchra M. E. Jones ex S. Watson var. duchesnensis Rollins, Syst. Bot. 6: 59. 1981; Boechera pulchra (M. E. Jones ex S. Watson) W. A. Weber var. duchesnensis (Rollins) Dorn, Brittonia 55: 3. 2003. TYPE: United States, Utah, Duchesne Co., 3.8 miles east of Duchesne, stony hillside in juniper area, 30 May 1979, Reed C. Rollins & Kathryn W. Rollins 79113 (holotype, GH!; isotypes, 2BRY!, MO!, NY!, RM!, US!).

     Plants mostly long-lived perennials, often with woody caudices, lacking crowded, persistent leaf bases ; apomictic, with spheroid pollen. Stems usually 1 per caudex branch, elevated on woody bases or produced near ground surface, arising from center of basal rosettes, 1.5–4.5 dm, lower parts with abundant, short-stalked, 2–7-rayed trichomes 0.2–0.5 mm (occasionally mixed with a few large trichomes proximally), upper parts sparsely pubescent. Leaves at stem bases linear-oblanceolate, 2–5 mm wide, entire or denticulate, ciliate on petiole base swith simple trichomes to 1 mm, blade surfaces densely pubescent with short-stalked, 4–8-rayed trichomes 0.15–0.40s mm; cauline leaves 3–8, not concealing stem, the uppermost sparsely pubescent, with auricles 0.7–2.0 mm. Inflorescences mostly unbranched, 11–22-flowered; fruiting pedicels 7–14 mm, horizontal, straight or slightly curved, with appressed, branched trichomes. Flowers divaricate-ascending at anthesis; sepals pubescent; petals whitish to pale lavender, 7–10 ´ 1.5–3.0 mm, glabrous; ovules 72–92 per fruit. Fruits 3.5–5.0 cm ´ 1.7–2.0 mm, horizontal, not appressed to rachises, not secund, usually straight, with parallel edges, glabrous proximally, pubescent distally; style 0.1–0.3 mm. Seeds subbiseriate, 1.1–1.3 ´ 0.7–1.0 mm; wing continuous, ca. 0.1 mm wide.

Flowering: May.

Habitat: sandy soil on rocky slopes, mostly in pinyon-juniper woodland.

Elevation: 1300–1800 m.

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

Reproductive mode: Apomictic triploid.

 

 
 


 

 
 
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