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Boechera cascadensis 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): 260. 2007. (Harvard Pap. Bot.) Name publication detail
 

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

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10. Boechera cascadensis Windham & Al-Shehbaz, Harvard Pap. Bot. 11: 260. 2007; Arabis microphylla Nuttall var. thompsonii Rollins, Rhodora 43: 429. 1941, not Boechera thompsonii (S. L. Welsh) N. H. Holmgren in N. H. Holmgren et al., Intermountain Fl. 2b: 374. 2005. TYPE: United States, Washington, Kittitas County, alpine meadows of Table Mt., 5000 ft [1515 m], 3 July 1933, J. W. Thompson 9266 (holotype, GH!; isotypes; MO!, NY!, US!).

     Plants long-lived, cespitose perennials, with somewhat 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, 0.5–2.2 dm, lower parts with few simple and short-stalked, 2–3-rayed trichomes 0.1–0.2 mm, upper parts glabrous. Leaves at stem bases linear-oblanceolate, 0.7–2.0 mm wide, entire, ciliate proximally with trichomes to 0.4 mm, blade surfaces densely pubescent with short-stalked, (2–)3–6-rayed trichomes 0.05–0.2(–0.3) mm; cauline leaves 4–6, not concealing stem, the uppermost glabrous, with auricles 0.5–1 mm. Inflorescences unbranched, 3–11-flowered; fruiting pedicels 3–8 mm, ascending to divaricate-ascending, straight, glabrous. Flowers ascending at anthesis; sepals glabrous or sparsely pubescent; petals lavender, 5–6 ´ 1.0–1.7 mm, glabrous; ovules 58–80 per fruit. Fruits 3.5–6.2 cm ´ 1.2–1.5 mm, ascending to divaricate-ascending, not appressed to rachises, not secund, straight, with parallel edges, glabrous; style 0.8–1.5 mm. Seeds uniseriate, 1.1–1.3 ´ 0.9–1.0 mm; wing continuous, 0.05–0.1 mm wide.

Flowering: Jun.

Habitat: basaltic cliffs and rocky slopes in subalpine areas.

Elevation: ca. 1900 m.

Distribution: United States (Oregon, Washington).

Reproductive mode: apomictic triploid.

 

 
 


 

 
 
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