Difference between revisions of "Boechera covillei"
Harvard Pap. Bot. 12: 237. 2007.
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|name=Arabis covillei | |name=Arabis covillei | ||
|authority=Greene | |authority=Greene | ||
| + | |rank=species | ||
|publication_title=Repert. Spec. Nov. Regni Veg. | |publication_title=Repert. Spec. Nov. Regni Veg. | ||
|publication_place=5: 243. 1908 | |publication_place=5: 243. 1908 | ||
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|name=Arabis leibergii | |name=Arabis leibergii | ||
|authority=Greene | |authority=Greene | ||
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}} | }} | ||
|hierarchy=Brassicaceae;Brassicaceae tribe Boechereae;Boechera;Boechera covillei | |hierarchy=Brassicaceae;Brassicaceae tribe Boechereae;Boechera;Boechera covillei | ||
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name=Boechera covillei | name=Boechera covillei | ||
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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 23:34, 5 November 2020
Perennials; long-lived; apomictic; caudex woody. Stems usually 1 per caudex branch, arising from center of rosette near ground surface, 0.5–2.5 dm, glabrous throughout. Basal leaves: blade oblanceolate, 1.5–5 mm wide, margins entire, ciliate proximally, trichomes (simple), to 0.4 mm, and distally, trichomes short-stalked, 2 or 3 (or 4)-rayed, 0.15–0.4 mm, surfaces glabrous. Cauline leaves: 2–7, not concealing stem; blade with auricles 0.2–1 mm, auricles rarely absent, surfaces of distalmost leaves glabrous. Racemes 2–9-flowered, unbranched. Fruiting pedicels ascending to suberect, straight, 6–20 mm, glabrous. Flowers ascending at anthesis; sepals glabrous; petals lavender to purplish, 5–6 × 1–2 mm, glabrous; pollen spheroid. Fruits ascending to suberect, rarely appressed to rachis, not secund, straight, edges slightly undulate (rarely parallel), 3.5–5 cm × 3–5 mm; valves glabrous; ovules 18–30 per ovary; style 0.2–1 mm. Seeds uniseriate, 4–5 × 3–4 mm; wing continuous, 1–1.5 mm wide.
Phenology: Flowering Jul–Aug.
Habitat: Rocky slopes in alpine meadows and open coniferous forests
Elevation: 2200-3500 m
Distribution
Calif., Nev., Oreg.
Discussion
Morphological evidence suggests that Boechera covillei is an apomictic species that arose through hybridization between B. howellii and B. lyallii (see M. D. Windham and I. A. Al-Shehbaz 2007b for detailed comparison).
Selected References
None.