Draba globosa

Payson
Amer. J. Bot. 4: 257. 1917.
Synonyms: Draba apiculata C. L. Hitchcock Draba densifolia var. apiculata (C. L. Hitchcock) S. L. Welsh Draba densifolia var. decipiens S. L. Welsh Draba densifolia var. globosa (Payson) S. L. Welsh
Treatment appears in FNA Volume 7. Treatment on page 308. Mentioned on page 280, 305.

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

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.

Lower Taxa

None.

... more about "Draba globosa"
Ihsan A. Al-Shehbaz +, Michael D. Windham +  and Reidar Elven +
Payson +
Idaho +, Mont. +, Utah +  and Wyo. +
2700-3900 m +
Ridges, talus, alpine tundra and meadows +
Flowering Jun–Aug. +
Amer. J. Bot. +
Draba apiculata +, Draba densifolia var. apiculata +, Draba densifolia var. decipiens +  and Draba densifolia var. globosa +
Draba globosa +
species +