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Boechera pusilla (Rollins) Dorn 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: Vascular Plants of Wyoming (ed. 3) 376. 2001. (Vasc. Pl. Wyoming (ed. 3)) Name publication detail
 

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

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82. Boechera pusilla (Rollins) Dorn, Vasc. Pl. Wyom. Ed. 3, 376. 2001; Arabis pusilla Rollins, Contr. Gray Herb. 212: 107. 1982. TYPE: United States, Wyoming, Fremont Co., off Wyoming State Hwy. 28, 39 mi. SW of Lander, cracks & crevices of huge metamorphosed rocks, 20 Jun 1981, R. C. & K. W. Rollins 81366 (holotype, GH!; isotypes, BRY!, E!, GH!, MO!, RM!, UC!).

     Plants long-lived, cespitose perennials, often with woody caudices, lacking crowded, persistent leaf bases; apomictic, with spheroid pollen. Stems usually 2–6 per caudex branch, arising near ground surface from margin of basal rosettes, 0.5–2.0 dm, lower parts glabrous or with few simple and short-stalked, 2-rayed trichomes to 0.2 mm, upper parts glabrous. Leaves at stem bases linear-oblanceolate, 1–2.5 mm wide, entire, ciliate on petiole with simple trichomes 0.4–0.7 mm, blade surfaces sparsely pubescent with short-stalked, 2–3-rayed trichomes 0.1–0.4 mm or rarely glabrous; cauline leaves 3–5, not concealing stem, the uppermost glabrous or rarely sparsely ciliate, with auricles to 0.2 mm or lacking. Inflorescences unbranched, 6–13-flowered; fruiting pedicels 2–5 mm, horizontal to divaricate-descending, straight or slightly curved downward, glabrous. Flowers divaricate-ascending at anthesis; sepals glabrous or with few spreading, 2-rayed trichomes; petals white to lavender, 4–5 ´ 1.5–1.8 mm, glabrous; ovules 20–32 per fruit. Fruits 1.6–3.2 cm ´ 1.5–2.0 mm, horizontal or divaricate-descending, not appressed to rachises, secund, straight, with parallel edges, glabrous; style 0.1–0.4 mm. Seeds uniseriate, 1.2–1.5 ´ 0.8–0.9 mm; wingless or with distal wing 0.05–0.1 mm wide.

Flowering: May–Jun.

Habitat: cracks and crevices of granitic rock outcrops.

Elevation: 2400–2450 m.

Distribution: United States (Wyoming).

Reproductive mode: apomictic triploid.

Notes: known only from the type collection.

 

 
 


 

 
 
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