Difference between revisions of "Draba graminea"
Pl. Baker. 3: 5. 1901.
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|place=3: 5. 1901 | |place=3: 5. 1901 | ||
|year=1901 | |year=1901 | ||
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| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=E | ||
| + | |label=Endemic | ||
| + | }}{{Treatment/ID/Special_status | ||
| + | |code=C | ||
| + | |label=Conservation concern | ||
}} | }} | ||
|basionyms= | |basionyms= | ||
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|name=Braya graminea | |name=Braya graminea | ||
|authority=(Greene) M. E. Jones | |authority=(Greene) M. E. Jones | ||
| + | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba chrysantha var. graminea | |name=Draba chrysantha var. graminea | ||
|authority=(Greene) O. E. Schulz | |authority=(Greene) O. E. Schulz | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba chrysantha var. hirticaulis | |name=Draba chrysantha var. hirticaulis | ||
|authority=O. E. Schulz | |authority=O. E. Schulz | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Brassicaceae;Brassicaceae tribe Arabideae;Draba;Draba graminea | |hierarchy=Brassicaceae;Brassicaceae tribe Arabideae;Draba;Draba graminea | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Draba graminea | name=Draba graminea | ||
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|authority=Greene | |authority=Greene | ||
|rank=species | |rank=species | ||
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|publication title=Pl. Baker. | |publication title=Pl. Baker. | ||
|publication year=1901 | |publication year=1901 | ||
| − | |special status= | + | |special status=Endemic;Conservation concern |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V7/V7_406.xml |
|tribe=Brassicaceae tribe Arabideae | |tribe=Brassicaceae tribe Arabideae | ||
|genus=Draba | |genus=Draba | ||
Latest revision as of 22:33, 5 November 2020
Perennials; (cespitose); caudex simple or branched (with persistent leaf bases); not scapose. Stems unbranched, 0.1–0.5(–0.8) dm, usually pubescent throughout, rarely glabrous, trichomes simple or subsessile, 2-rayed or spurred, (crisped), 0.1–0.5 mm. Basal leaves rosulate; petiolate; petiole ciliate, (trichomes usually straight and simple, rarely also 2-rayed, 0.2–0.6(–0.8) mm); blade linear to linear-oblanceolate, (0.5–)1–4 cm × 0.3–2(–3) mm, margins entire (pubescent as petiole), surfaces glabrous. Cauline leaves (1–)3–9(–12) (as bracts); sessile; blade linear to oblanceolate or lanceolate, margins entire, (ciliate proximally, similar to basal). Racemes 3–15-flowered, bracteate, elongated in fruit; rachis not flexuous, usually pubescent as stem, rarely glabrous. Fruiting pedicels divaricate-ascending, usually straight, rarely curved upward, 3–10(–15) mm, usually pubescent as stem, rarely glabrous. Flowers: sepals ovate, 1.5–2.5 mm, glabrous or pubescent, (trichomes simple and short-stalked, 2-rayed); petals yellow, spatulate to obovate, 3–5 × 1.5–3 mm; anthers ovate, 0.3–0.5 mm. Fruits ovate-elliptic to lanceolate, slightly twisted or plane, flattened, 5–11 × 2.5–5 mm; valves glabrous; ovules 8–16 per ovary; style 0.2–0.7 mm. Seeds ovoid, 1.2–1.5 × 0.7–1 mm. 2n = 18.
Phenology: Flowering Jul–Sep.
Habitat: Rocky areas and ridges, alpine tundra, gravel bars in streams
Elevation: 3000-4100 m
Discussion
Of conservation concern.
Draba graminea is occasionally confused with D. crassa, which occupies similar habitats and elevations. It is easily distinguished from the latter by having narrower [0.3–2(–3) versus 2.5–8(–10) mm wide] basal leaves and bracteate (versus ebracteate) racemes. It is known to us only from Hinsdale, La Plata, Ouray, San Juan, and San Miguel counties.
Selected References
None.