|University of California, Berkeley|
|Jepson eFlora: Taxon page
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|Family: Brassicaceae (Cruciferae)||View Description||Dichotomous Key|
|Genus: Draba||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Draba oligosperma Hook.
Habit: Perennial herb, tufted, scapose, cushion-forming. Stem: unbranched, (1)2--6(10) cm, glabrous or hairs sessile, stellate. Leaf: (2)4--11(15) mm, linear to linear-oblanceolate, entire, midvein prominent, hairs sessile, comb-like, 7--16-rayed, long axis parallel to midvein and branches shorter toward hair tips, adaxial occasionally glabrous; cauline leaves 0. Inflorescence: 4--12(17)-flowered; axis glabrous or as hairy as stem; pedicels (2)3--10(13) mm. Flower: sepals 1.5--3 mm; petals 2.5--4 mm, 1.5--3 mm wide, yellow. Fruit: 3--6(7) mm, ovoid to lanceolate, inflated at least near base, not twisted, puberulent with simple and sessile, generally unequally 2-rayed hairs; style 0.1--0.8(1) mm. Seed: 6--12, 1.3--1.8 mm, ovoid. Chromosomes: 2n=32,64.
Ecology: Common. Alpine barrens, dry slopes, tundra; Elevation: 2000--3900 m. Bioregional Distribution: SNH, n SNE, W&I; Distribution Outside California: western Canada, western United States. Flowering Time: May--Aug Note: Generally produces seeds asexually.
eFlora Treatment Author: Ihsan A. Al-Shehbaz
Jepson Online Interchange
Previous taxon: Draba novolympica
Next taxon: Draba praealta
Citation for this treatment: Ihsan A. Al-Shehbaz 2017. Draba oligosperma, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=23389, accessed on April 25, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on April 25, 2017.