Difference between revisions of "Boechera howellii"
Harvard Pap. Bot. 11: 69. 2006.
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|name=Arabis howellii | |name=Arabis howellii | ||
|authority=S. Watson | |authority=S. Watson | ||
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|publication_title=Proc. Amer. Acad. Arts | |publication_title=Proc. Amer. Acad. Arts | ||
|publication_place=25: 124. 1890 | |publication_place=25: 124. 1890 | ||
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|name=Arabis conferta | |name=Arabis conferta | ||
|authority=Greene | |authority=Greene | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Arabis inamoena var. acutata | |name=Arabis inamoena var. acutata | ||
|authority=Jepson | |authority=Jepson | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Arabis platyloba | |name=Arabis platyloba | ||
|authority=Greene | |authority=Greene | ||
| + | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Arabis platysperma var. howellii | |name=Arabis platysperma var. howellii | ||
|authority=(S. Watson) Jepson | |authority=(S. Watson) Jepson | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Arabis platysperma var. imparata | |name=Arabis platysperma var. imparata | ||
|authority=Jepson | |authority=Jepson | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Brassicaceae;Brassicaceae tribe Boechereae;Boechera;Boechera howellii | |hierarchy=Brassicaceae;Brassicaceae tribe Boechereae;Boechera;Boechera howellii | ||
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name=Boechera howellii | name=Boechera howellii | ||
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|authority=(S. Watson) Windham & Al-Shehbaz | |authority=(S. Watson) Windham & Al-Shehbaz | ||
|rank=species | |rank=species | ||
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|publication year=2006 | |publication year=2006 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V7/V7_541.xml |
|tribe=Brassicaceae tribe Boechereae | |tribe=Brassicaceae tribe Boechereae | ||
|genus=Boechera | |genus=Boechera | ||
Latest revision as of 23:34, 5 November 2020
Perennials; long-lived; sexual; caudex usually woody. Stems usually 1 per caudex branch, arising from center of rosette near ground surface, 0.6–2(–3) dm, glabrous throughout. Basal leaves: blade narrowly oblanceolate, 1–7 mm wide, margins entire, ciliate proximally, trichomes (simple mixed with a few short-stalked, 2-rayed ones) 0.1–0.4 mm, surfaces glabrous. Cauline leaves: 2–4, not concealing stem; blade auricles (0–)0.2–1 mm, surfaces of distalmost leaves usually glabrous, rarely ciliate proximally. Racemes 2–5-flowered, unbranched. Fruiting pedicels ascending, straight, 4–10 mm, glabrous. Flowers erect to ascending at anthesis; sepals glabrous; petals white to dark lavender, 4–8 × 1–2.5 mm, glabrous; pollen ellipsoid. Fruits suberect to ascending, usually not appressed to rachis, not secund, straight to curved, edges often somewhat undulate (not parallel), 2.5–6.5 cm × 3–7 mm; valves glabrous; ovules 10–20 per ovary; style 0.05–0.3 mm. Seeds uniseriate, 3–6 × 2–4 mm; wing continuous, 1.3–2.5 mm wide.
Phenology: Flowering Jun–Aug.
Habitat: Rock outcrops, talus slopes and gravelly soil in alpine and subalpine habitats
Elevation: 1800-3800 m
Distribution
Calif., Nev., Oreg.
Discussion
Boechera howellii usually is subsumed under B. platysperma, but the two taxa are distinct (see M. D. Windham and I. A. Al-Shehbaz 2006 for detailed comparison).
Selected References
None.