Difference between revisions of "Draba sierrae"

Sharsmith

Madroño 5: 149. 1940.

EndemicConservation concern
Treatment appears in FNA Volume 7. Treatment on page 337. Mentioned on page 283, 286.
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|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V7/V7_466.xml
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|tribe=Brassicaceae tribe Arabideae
 
|tribe=Brassicaceae tribe Arabideae
 
|genus=Draba
 
|genus=Draba

Latest revision as of 22:33, 5 November 2020

Perennials; (cespitose, pulvinate, canescent); caudex branched (covered with persistent leaves, branches sometimes terminating in sterile rosettes); scapose. Stems unbranched, (0.05–)0.1–0.4 dm, pubescent throughout, trichomes pectinate or 2–4-rayed, 0.1–0.4 mm, and sometimes simple. Basal leaves (densely imbricate); rosulate; sessile; blade oblong, 0.2–0.6(–0.8) cm × 0.7–1.5(–2) mm, margins entire, (sometimes ciliate, trichomes simple, 0.5–1 mm), surfaces densely pubescent with stalked, subdendritic, 7–12-rayed trichomes, 0.2–0.5 mm. Cauline leaves 0. Racemes 2–6(–9)-flowered, ebracteate, elongated in fruit; rachis not flexuous, pubescent as stem. Fruiting pedicels divaricate to ascending, straight, 2–5(–7) mm, pubescent as stem. Flowers: sepals oblong, 2.5–3.5 mm, pubescent, (trichomes short-stalked, branched); petals yellow, spatulate, 4–5 × 1.2–1.8 mm; anthers oblong, 0.5–0.7 mm. Fruits lanceolate to elliptic or broadly oblong to ovate-orbicular, often twisted, occasionally plane, flattened, 4–8(–10) × (2–)3–4.5 mm (asymmetric); valves pubescent, trichomes short-stalked, subpectinate, or 2–4-rayed, 0.05–0.3 mm, sometimes with simple ones; ovules 8–14(–16) per ovary; style (0.1–)0.3–0.7(–1) mm. Seeds ovoid, 1.2–1.5 × 0.7–1 mm.


Phenology: Flowering Jun–Aug.
Habitat: Granite outcrops, rocky slopes
Elevation: 3500-3900 m

Discussion

Of conservation concern.

Draba sierrae is known only from the southern Sierra Nevada in east-central California (Inyo and Fresno counties).

Selected References

None.

Lower Taxa

None.