Difference between revisions of "Draba daviesiae"
Contr. Gray Herb. 214: 5. 1984.
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|name=Draba apiculata var. daviesiae | |name=Draba apiculata var. daviesiae | ||
|authority=C. L. Hitchcock | |authority=C. L. Hitchcock | ||
| + | |rank=variety | ||
|publication_title=in C. L. Hitchcock et al., Vasc. Pl. Pacif. N.W. | |publication_title=in C. L. Hitchcock et al., Vasc. Pl. Pacif. N.W. | ||
|publication_place=2: 489, fig. p. 493 [upper right]. 1964 | |publication_place=2: 489, fig. p. 493 [upper right]. 1964 | ||
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|name=Draba densifolia var. daviesiae | |name=Draba densifolia var. daviesiae | ||
|authority=(C. L. Hitchcock) S. L. Welsh & Reveal | |authority=(C. L. Hitchcock) S. L. Welsh & Reveal | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Brassicaceae;Brassicaceae tribe Arabideae;Draba;Draba daviesiae | |hierarchy=Brassicaceae;Brassicaceae tribe Arabideae;Draba;Draba daviesiae | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Draba daviesiae | name=Draba daviesiae | ||
| − | |||
|authority=(C. L. Hitchcock) Rollins | |authority=(C. L. Hitchcock) Rollins | ||
|rank=species | |rank=species | ||
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|publication year=1984 | |publication year=1984 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V7/V7_400.xml |
|tribe=Brassicaceae tribe Arabideae | |tribe=Brassicaceae tribe Arabideae | ||
|genus=Draba | |genus=Draba | ||
Revision as of 22:16, 16 December 2019
Perennials; (densely pulvinate); caudex branched (branches elongated, loose, with persistent leaf remains, terminating in flowering or sterile shoots); scapose. Stems unbranched, (0.05–)0.2–0.6 dm, glabrous. Basal leaves (densely imbricate); rosulate; petiolate; petiole ciliate throughout; blade (fleshy), oblong to obovate or oblanceolate, 0.3–0.7(–1) cm × 1–2(–2.5) mm, margins entire, (ciliate, trichomes simple, 0.1–0.5 mm, apex obtuse), surfaces glabrous (midvein obscure abaxially). Cauline leaves 0. Racemes 2–8(–10)-flowered, ebracteate, (subcorymbose), slightly elongated in fruit; rachis not flexuous, glabrous. Fruiting pedicels divaricate-ascending (not decurrent basally), straight, 4–10 mm, glabrous. Flowers: sepals oblong, 1.5–2.2 mm, glabrous; petals pale to bright yellow, spatulate, 3.5–4 × 1–2 mm; anthers ovate, 0.3–0.4 mm. Fruits ovate to oblong-elliptic, plane, flattened, 4–8 × 2–4 mm; valves (obscurely veined), glabrous; ovules 6–14 per ovary; style 0.1–0.5 mm. Seeds ovoid, 1.2–1.5 × 0.8–1 mm.
Phenology: Flowering Jul–Aug.
Habitat: Talus slopes, rock crevices and cracks, rocky ridges and slides, alpine meadows
Elevation: 2700-2900 m
Discussion
Although originally described as a variety of Draba apiculata (= D. globosa), D. daviesiae is distinct morphologically. It is easily distinguished from the former by its densely pulvinate habit, obtuse leaf blades, and obscurely veined fruit valves. By contrast, D. globosa exhibits a cespitose but non-pulvinate habit, acute leaf blades, and prominently veined fruit valves. Draba daviesiae is known from the Bitterroot Mountains in Ravalli County.
Selected References
None.