Difference between revisions of "Draba oreibata"
Amer. J. Bot. 4: 257. 1917.
FNA>Volume Importer |
FNA>Volume Importer |
||
| Line 23: | Line 23: | ||
|elevation=1800-2700 m | |elevation=1800-2700 m | ||
|distribution=Idaho. | |distribution=Idaho. | ||
| − | |discussion=<p>R. C. Rollins (1993) and N. H. Holmgren (2005b) divided <i>Draba oreibata</i> into two varieties: the Idaho endemic var. oreibata and the <i>Nevada</i> endemic < | + | |discussion=<p>R. C. Rollins (1993) and N. H. Holmgren (2005b) divided <i>Draba oreibata</i> into two varieties: the Idaho endemic var. oreibata and the <i>Nevada</i> endemic <i></i>var.<i> serpentina</i>. As indicated by I. A. Al-Shehbaz and M. D. Windham (2007), the two taxa are morphologically distinct, have different chromosome numbers, and are separated by over 480 kilometers. They are treated herein as separate species, and distinguished by characteristics discussed by Al-Shehbaz and Windham. <i>Draba oreibata</i>, in the strict sense, is known from Blaine, Butte, Clark, Custer, and Lemhi counties.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
| Line 32: | Line 32: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Draba oreibata | name=Draba oreibata | ||
| − | |||
|authority=J. F. Macbride & Payson | |authority=J. F. Macbride & Payson | ||
|rank=species | |rank=species | ||
| Line 47: | Line 46: | ||
|publication year=1917 | |publication year=1917 | ||
|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_440.xml |
|tribe=Brassicaceae tribe Arabideae | |tribe=Brassicaceae tribe Arabideae | ||
|genus=Draba | |genus=Draba | ||
Revision as of 22:16, 16 December 2019
Perennials; (cespitose); caudex branched (with persistent leaves, branches sometimes terminating in sterile rosettes); scapose. Stems unbranched, 0.2–0.9 dm, glabrous throughout. Basal leaves rosulate; sessile; blade oblong to narrowly oblanceolate, 0.2–1 cm × 0.6–2(–4) mm, margins entire, (ciliate, trichomes simple, 0.1–0.5 mm, apex obtuse), surfaces glabrous. Cauline leaves 0. Racemes 3–8-flowered, ebracteate, considerably elongated in fruit; rachis slightly flexuous, glabrous. Fruiting pedicels divaricate-ascending to ascending, straight, 4–13 mm, glabrous. Flowers: sepals oblong, 1.7–2.5 mm, glabrous; petals white, oblanceolate to obovate, 3.5–4.5 × 1.2–2 mm; anthers ovate, 0.3–0.4 mm. Fruits oblong to narrowly so, slightly twisted, flattened, 5–9 × 1.5–3 mm; valves glabrous; ovules 8–16 per ovary; style 0.3–0.9(–1.2) mm. Seeds oblong, 0.9–1.3 × 0.6–0.8 mm. 2n = 32.
Phenology: Flowering May–Jul.
Habitat: Limestone cliffs, talus
Elevation: 1800-2700 m
Discussion
R. C. Rollins (1993) and N. H. Holmgren (2005b) divided Draba oreibata into two varieties: the Idaho endemic var. oreibata and the Nevada endemic var. serpentina. As indicated by I. A. Al-Shehbaz and M. D. Windham (2007), the two taxa are morphologically distinct, have different chromosome numbers, and are separated by over 480 kilometers. They are treated herein as separate species, and distinguished by characteristics discussed by Al-Shehbaz and Windham. Draba oreibata, in the strict sense, is known from Blaine, Butte, Clark, Custer, and Lemhi counties.
Selected References
None.