Difference between revisions of "Draba globosa"
Amer. J. Bot. 4: 257. 1917.
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|name=Draba apiculata | |name=Draba apiculata | ||
|authority=C. L. Hitchcock | |authority=C. L. Hitchcock | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba densifolia var. apiculata | |name=Draba densifolia var. apiculata | ||
|authority=(C. L. Hitchcock) S. L. Welsh | |authority=(C. L. Hitchcock) S. L. Welsh | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba densifolia var. decipiens | |name=Draba densifolia var. decipiens | ||
|authority=S. L. Welsh | |authority=S. L. Welsh | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba densifolia var. globosa | |name=Draba densifolia var. globosa | ||
|authority=(Payson) S. L. Welsh | |authority=(Payson) S. L. Welsh | ||
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|hierarchy=Brassicaceae;Brassicaceae tribe Arabideae;Draba;Draba globosa | |hierarchy=Brassicaceae;Brassicaceae tribe Arabideae;Draba;Draba globosa | ||
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name=Draba globosa | name=Draba globosa | ||
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|authority=Payson | |authority=Payson | ||
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|publication year=1917 | |publication year=1917 | ||
|special status= | |special status= | ||
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|tribe=Brassicaceae tribe Arabideae | |tribe=Brassicaceae tribe Arabideae | ||
|genus=Draba | |genus=Draba | ||
Latest revision as of 22:33, 5 November 2020
Perennials; (cespitose, pulvinate); caudex branched (with persistent leaves, branches sometimes terminating in sterile rosettes); scapose. Stems unbranched, 0.1–0.5 dm, glabrous. Basal leaves rosulate; sessile; blade (not fleshy), narrowly oblanceolate or lanceolate to linear, (0.2–)0.3–0.8 cm × 0.5–1.6(–2) mm, margins entire (ciliate, trichomes simple, 0.1–0.8 mm, apex acute, trichomes usually longer), surfaces glabrous, (midvein obscure abaxially). Cauline leaves 0. Racemes 2–5(–7)-flowered, ebracteate, slightly elongated in fruit; rachis not flexuous, glabrous. Fruiting pedicels divaricate-ascending, straight or slightly curved, 2–6 mm, glabrous. Flowers: sepals (persistent to near fruit maturity), ovate to broadly oblong, 2–3 mm, glabrous; petals white to pale yellow, obovate, 2.5–4 × 1.2–2 mm; anthers oblong, 0.4–0.6 mm. Fruits ovate, plane, flattened, 4.5–8 × 2.5–4 mm; valves (distinctly veined), glabrous; ovules 8–16 per ovary; style (0.1–)0.2–0.6 mm. Seeds oblong, 1.1–1.4 × 0.8–1 mm.
Phenology: Flowering Jun–Aug.
Habitat: Ridges, talus, alpine tundra and meadows
Elevation: 2700-3900 m
Distribution
Idaho, Mont., Utah, Wyo.
Discussion
Draba globosa is an apomictic species closely related to D. burkei (M. D. Windham, unpubl.). Though often treated as a variety of D. densifolia, it is morphologically and phyletically distinct from that species. Both R. C. Rollins (1993) and N. H. Holmgren (2005b) indicated that the species occurs in Colorado, but we have not seen material for that state.
Selected References
None.