Draba kassii

S. L. Welsh

Great Basin Naturalist 46: 264. 1986.

EndemicConservation concern
Treatment appears in FNA Volume 7. Treatment on page 315. Mentioned on page 282.

Perennials; caudex branched (densely covered with persistent petiole remains, branches sometimes terminating in sterile rosettes); scapose. Stems unbranched, 0.5–1.8 dm, glabrous. Basal leaves rosulate; long-petiolate; petiole ciliate throughout; blade oblanceolate to linear-oblanceolate, 1.5–5.5 cm × (1.5–)2–5.5 mm, margins entire (ciliate, trichomes simple, 0.2–1 mm), surfaces abaxially sparsely pubescent with short-stalked, submalpighiaceous trichomes, 0.3–1.3 mm, sometimes with 3- or 4-rayed ones, adaxially usually glabrous, rarely sparsely pubescent. Cauline leaves 0. Racemes 3–8(–10)-flowered, ebracteate, considerably elongated in fruit; rachis not flexuous, glabrous. Fruiting pedicels ascending to divaricate-ascending, straight, 5–14(–17) mm, glabrous. Flowers: sepals broadly ovate, 2–3 mm, subapically sparsely pubescent, (trichomes simple); petals yellow, oblanceolate, 4.5–7 × 1.2–2 mm; anthers ovate, 0.4–0.5 mm. Fruits elliptic to oblong-elliptic, plane, flattened, 3–10(–14) × 2–3 mm; valves glabrous; ovules 20–28 per ovary; style 0.6–1 mm. Seeds oblong, 1.2–1.4 × 0.7–0.8 mm. 2n = 22.

Phenology: Flowering Apr–Jun.
Habitat: Quartzite and granitic outcrops
Elevation: 2100-2600 m


Of conservation concern.

Draba kassii is a distinctive species that is known from the Deep Creek Mountains in Juab and Tooele counties.

Selected References


Lower Taxa