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Boechera platysperma (A. Gray) 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: Novon 13(4): 388. 2003. (Novon) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

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

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76. Boechera platysperma (A. Gray) Al-Shehbaz, Novon 13: 388. 2003; Arabis platysperma A. Gray, Proc. Amer. Acad. Arts 6: 519. 1865. TYPE: United States, California, Alpine Co., Ebbetts Pass, 1863, W. H. Brewer 1989 (lectotype designated by Rollins (1941: 473), GH!; isotypes, MO!, UC!, US!).

Arabis inamoena Greene, Repert. Sp. Nov. Regni Veg. 5: 243. 1908, not Greene, Leafl. Bot. Observ. Crit. 2: 158. 1911. TYPE: United States, California, Tulare Co., Long Meadow, 8000-9000 ft, 7-14 July 1888, D. Palmer 192 (holotype, US!; isotype, K!).

A. oligantha Greene, Repert. Sp. Nov. Regni Veg. 5: 243. 1908. TYPE: United States, California, Fresno Co., Dinkey Creek, 25 June-15 July 1900, 5300 ft, H. M. Hall & H. P. Chandler 354 (holotype, US!; isotypes, DS!, E!, K!, MO!, NY!, UC!).

     Plants long-lived perennials, with woody caudices, lacking crowded, persistent leaf bases; sexual, with ellipsoid pollen. Stems usually 1 per caudex branch, elevated above ground surface on woody bases or produced near ground surface, arising from center of basal rosettes, 0.6–2.8(–3.5) dm, lower parts with abundant short-stalked, 2–5-rayed trichomes 0.1–0.3 mm, upper parts glabrous or sparsely pubescent. Leaves at stem bases narrowly oblanceolate, 3–7(–10) mm wide, entire, ciliate near petiole bases with simple or spurred trichomes to 1 mm, blade surfaces densely pubescent with short-stalked, 2–5-rayed trichomes 0.1–0.3 mm; cauline leaves 3–7(–12), not concealing stem, the uppermost glabrous to sparsely pubescent, without auricles. Inflorescences unbranched, 2–7-flowered; fruiting pedicels 3–13 mm, ascending, straight, glabrous or with few appressed, branched trichomes. Flowers ascending at anthesis; sepals pubescent; petals creamy white to purplish, 4–6 ´ 1–2 mm, often with a few trichomes abaxially; ovules 16–44 per fruit. Fruits (2.5–)4.0–8.5 cm ´ 3.0–5.5 mm, ascending, not appressed to rachises, not secund, straight to slightly curved, with undulate (non-parallel) edges, glabrous; style 0.05–1.0 mm. Seeds uniseriate, 3–6(–8) ´ 2.0–3.5 mm; wing continuous, 0.8–2.5 mm wide. 2n = 14.

Flowering Jun–Aug.

Habitat: rock outcrops and gravelly soil in dry pine forests and lodgepole-chaparral woodlands. Elevation: 1600–3000 m.

Distribution: United States (California, Oregon).

Reproductive mode: sexual diploid.

 
 


 

 
 
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