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Boechera peirsonii 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): 270–271. 2007. (Harvard Pap. Bot.) Name publication detail
 

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

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69. Boechera peirsonii Windham & Al-Shehbaz, Harvard Pap. Bot. 11: 270. 2007. TYPE: United States, California, San Bernardino Co., San Bernardino Mts., rocky ledge above Dollar Lake, 9100 ft [2758 m], 24 Aug 1922, F. W. Peirson 3269 (holotype, RSA!; isotype, CAS!).

Arabis breweri S. Watson var. pecuniaria Rollins, Rhodora 43: 409. 1941. TYPE: United States, California, San Bernardino Co., San Bernardino Mts., Dollar Lake, rocky ledges, 9250 ft [2803 m], 24 Aug 1922, P. A. Munz 6238 (holotype, GH!).

     Plants long-lived, cespitose perennials, 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, 1.0–2.5 dm, lower parts glabrous or with few short-stalked, 2–5-rayed (rarely a few simple) trichomes 0.4–0.6 mm, upper parts glabrous. Leaves at stem bases oblanceolate, 2.5–6.0 mm wide, entire, ciliate proximally with simple trichomes, blade surfaces densely pubescent with short-stalked, 4–7-rayed trichomes 0.3–0.5 mm; cauline leaves 3–12, often concealing stem proximally, the uppermost glabrous or ciliate, with auricles 0.5–2 mm. Inflorescences mostly unbranched, 12–25-flowered; fruiting pedicels 2–6 mm, ascending to divaricate-descending, straight, glabrous. Flowers ascending at anthesis; sepals pubescent; petals purple, 5–6 ´ 1.5–2.0 mm, glabrous; ovules 56–80 per fruit. Fruits 2.0–3.7 cm ´ 2.0–2.8 mm, ascending to divaricate-ascending, not appressed to rachises, not secund, straight, with parallel edges, glabrous; style 0.1–0.3 mm. Seeds uniseriate, 1.0–1.5 ´ 0.8–1.0 mm; wing distal or continuous, 0.05–0.10 mm wide.

Flowering: Jun–Sep.

Habitat: granitic ledges and talus slopes.

Elevation: 2700–3350 m.

Distribution: United States (California/San Bernardino County).

Reproductive mode: apomictic triploid.

 

 
 
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