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Boechera spatifolia (Rydb.) 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(1): 84. 2006. (Harvard Pap. Bot.) Name publication detail
 

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

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99. Boechera spatifolia (Rydberg) Windham & Al-Shehbaz, Harvard Pap. Bot. 11: 84. 2006; Arabis spatifolia Rydberg, Fl. Rocky Mts. 361. 1917; A. fendleri (S. Watson) Greene var. spatifolia (Rydberg) Rollins, Rhodora 43: 394. 1941; Boechera fendleri (S. Wats.) W. A. Weber subsp. spatifolia (Rydberg) W. A. Weber, Phytologia 51: 370. 1982; B. fendleri var. spatifolia (Rydberg) Dorn, Vasc. Pl. Wyoming, ed. 3. 375. 2001. TYPE: United States, Colorado, Larimer Co., Estes Park, 20 Jul 1903, G. E. Osterhout 2808 (holotype, NY!; isotype, RM!).

     Plants short- to long-lived perennials, with mostly non-woody caudices, rarely with crowded, persistent leaf bases; sexual, with ellipsoid pollen. Stems usually per caudex branch, arising near ground surface from center of basal rosettes, 1.5–3.5(–5) dm, lower parts many simple and few short-stalked, 2-rayed trichomes 0.3–0.7 mm. Leaves at stem bases narrowly oblanceolate, 1.5–3.0(–4.0) mm wide, entire, strongly ciliate at least on petioles with simple trichomes to 1 mm, blade surfaces glabrous or with few simple and short-stalked, 2-rayed trichomes 0.3–0.7 mm; cauline leaves 5–15(–20), often concealing stem proximally, the uppermost usually glabrous, with auricles 0.5–1.5 mm. Inflorescences mostly unbranched, 10–30-flowered; fruiting pedicels 6–10(–15) mm, horizontal or slightly descending, curved or angled downward, glabrous or rarely with few spreading, simple trichomes. Flowers divaricate-ascending at anthesis; sepals pubescent; petals white or rarely pale lavender, 3.0–3.7(–4.0) ´ 0.5–0.8 mm, glabrous; ovules 90–126 per fruit. Fruits 3.3–5.7 cm ´ 1.2–1.8 mm, pendent, not appressed to rachises, rarely slightly secund, straight or gently curved, with parallel edges, glabrous; style 0.1–0.4 mm. Seeds biseriate, 0.7–0.9 ´ 0.5–0.6 mm; wing distal, 0.05–0.10 mm wide, occasionally absent. 2n = 14.

Flowering: May–Aug.

Habitat: rocky slopes and gravelly soil in sagebrush, pinyon-juniper woodland, open conifer forests and subalpine meadows.

Elevation: 1800–2750 m.

Distribution: United States (Colorado, New Mexico).

Reproductive mode: sexual diploid.

 

 
 
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