Difference between revisions of "Boechera drepanoloba"
Harvard Pap. Bot. 11: 263. 2007.
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|name=Arabis drepanoloba | |name=Arabis drepanoloba | ||
|authority=Greene | |authority=Greene | ||
| + | |rank=species | ||
| + | |publication_title=Pittonia | ||
| + | |publication_place=3: 306. 1898 | ||
}} | }} | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
|name=Arabis drummondii var. oreophila | |name=Arabis drummondii var. oreophila | ||
|authority=(Rydberg) M. Hopkins | |authority=(Rydberg) M. Hopkins | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Arabis lemmonii var. drepanoloba | |name=Arabis lemmonii var. drepanoloba | ||
|authority=(Greene) Rollins | |authority=(Greene) Rollins | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Arabis oreophila | |name=Arabis oreophila | ||
|authority=Rydberg | |authority=Rydberg | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Brassicaceae;Brassicaceae tribe Boechereae;Boechera;Boechera drepanoloba | |hierarchy=Brassicaceae;Brassicaceae tribe Boechereae;Boechera;Boechera drepanoloba | ||
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name=Boechera drepanoloba | name=Boechera drepanoloba | ||
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|authority=(Greene) Windham & Al-Shehbaz | |authority=(Greene) Windham & Al-Shehbaz | ||
|rank=species | |rank=species | ||
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|publication year=2007 | |publication year=2007 | ||
|special status= | |special status= | ||
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|tribe=Brassicaceae tribe Boechereae | |tribe=Brassicaceae tribe Boechereae | ||
|genus=Boechera | |genus=Boechera | ||
Latest revision as of 22:34, 5 November 2020
Perennials; short- to long-lived; apomictic; caudex usually not woody. Stems usually 1 per caudex branch, arising from center of rosette near ground surface, 1–4 dm, glabrous or sparsely pubescent proximally, trichomes sessile or subsessile, 2- or 3-rayed, 0.1–0.3 mm, glabrous distally. Basal leaves: blade oblanceolate, 2–6 mm wide, margins entire, ciliate along petiole, trichomes (submalpighiaceous or simple), to 0.6 mm, surfaces sparsely to densely pubescent, trichomes subsessile, 2–6-rayed, 0.1–0.3 mm. Cauline leaves: 3–15, often concealing stem proximally; blade auricles 0.7–2.5 mm, surfaces of distalmost leaves usually glabrous. Racemes 5–25-flowered, usually unbranched. Fruiting pedicels horizontal to ascending, straight or curved, 4–8 mm, glabrous. Flowers ascending at anthesis; sepals glabrous or pubescent with scattered trichomes; petals purple to lavender, 6–8 × 1.5–2.5 mm, glabrous; pollen spheroid. Fruits horizontal to ascending, secund, straight to slightly curved, edges parallel, 3–5.8 cm × 2–3.5 mm; valves glabrous; ovules 44–76(–104) per ovary; style 0.05–0.5 mm. Seeds uniseriate, 1.5–2.2 × 1.2–1.6 mm; wing continuous, 0.3–0.7 mm wide.
Phenology: Flowering Jul–Aug.
Habitat: Rocky slopes and talus in alpine and subalpine habitats
Elevation: 2000-3800 m
Distribution
Alta., Alaska, Colo., Idaho, Mont., Oreg., Utah, Wash., Wyo.
Discussion
Morphological evidence suggests that Boechera drepanoloba is an apomictic species that arose through hybridization between B. lemmonii and B. stricta (see M. D. Windham and I. A. Al-Shehbaz 2007 for detailed comparison).
Selected References
None.