Difference between revisions of "Draba maguirei"
Revis. Drabas W. N. Amer., 70, plate 5, figs. 37a–c. 1941.
FNA>Volume Importer |
FNA>Volume Importer |
||
| Line 23: | Line 23: | ||
|elevation=1600-2900 m | |elevation=1600-2900 m | ||
|distribution=Utah. | |distribution=Utah. | ||
| − | |discussion=<p>Draba maguirei is known from the Bear River Range in Cache County. Despite this very narrow distribution, the species includes two ploidy levels (diploid and tetraploid) that are morphologically and ecologically distinct (M. D. Windham, unpubl.).</p> | + | |discussion=<p><i>Draba maguirei</i> is known from the Bear River Range in Cache County. Despite this very narrow distribution, the species includes two ploidy levels (diploid and tetraploid) that are morphologically and ecologically distinct (M. D. Windham, unpubl.).</p> |
|tables= | |tables= | ||
|references= | |references= | ||
| Line 47: | Line 47: | ||
|publication year=1941 | |publication year=1941 | ||
|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/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V7/V7_426.xml |
|tribe=Brassicaceae tribe Arabideae | |tribe=Brassicaceae tribe Arabideae | ||
|genus=Draba | |genus=Draba | ||
Revision as of 17:57, 18 September 2019
Perennials; (cespitose, forming loose mats); caudex branched (with some persistent leaf bases, branches often creeping, sometimes terminating in sterile rosettes); scapose. Stems unbranched, (0.4–)0.7–1.7(–2.2) dm, usually glabrous, rarely proximalmost parts and sterile shoots pubescent, trichomes short-stalked, 2–4-rayed, 0.2–0.5 mm. Basal leaves rosulate; sessile; blade oblanceolate, (0.5–)0.7–1.4(–2) cm × 1.5–3.5(–5) mm, margins entire, surfaces pubescent with stalked, cruciform, and 2- or 3-rayed trichomes, 0.2–0.6 mm, (sometimes trichomes only on margins or apex, not ciliate, midvein obscure abaxially). Cauline leaves 0. Racemes 5–18(–23)-flowered, ebracteate, elongated in fruit; rachis not flexuous, glabrous. Fruiting pedicels divaricate-ascending to ascending (not expanded basally), straight, 5–13(–18) mm, glabrous. Flowers: sepals ovate, 2.5–4 mm, glabrous; petals yellow, oblanceolate, 5–7 × 2–3 mm; anthers ovate, 0.5–0.6 mm. Fruits broadly ovate to lanceolate, plane (not curved), flattened, (3–)4–6.5(–8) × 2–3 mm; valves glabrous or puberulent, trichomes simple, 0.05–0.2 mm; ovules 4–8 per ovary; style 0.6–1.7 mm. Seeds ovoid to oblong, 1.6–2 × 1–1.3 mm. 2n = 16, 32.
Phenology: Flowering May–Jul.
Habitat: Dolomite outcrops, talus, rocky slopes
Elevation: 1600-2900 m
Discussion
Draba maguirei is known from the Bear River Range in Cache County. Despite this very narrow distribution, the species includes two ploidy levels (diploid and tetraploid) that are morphologically and ecologically distinct (M. D. Windham, unpubl.).
Selected References
None.