Draba oligosperma Hook.
  • Fl. Bor.-Amer.

Cite taxon page as 'WFO (2020): Draba oligosperma Hook. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000655861. Accessed on: 05 Apr 2020'

General Information

Perennials; (cespitose, densely pulvinate); caudex branched (with persistent leaf bases, branches congested or somewhat creeping, sometimes terminating in sterile rosettes); scapose. Stems unbranched, (0.1-)0.2-0.6 (-1) dm, glabrous throughout or pubescent, trichomes sessile, pectinate, 0.1-0.3 mm, (their length parallel to long axis of stem). Basal leaves rosulate; sessile; blade linear to linear-oblanceolate, (0.2-)0.4-1.1(-1.5) cm × 0.4-1.5(-1.8) mm, margins entire, (not or, rarely, ciliate, trichomes simple, 0.2-0.4 mm), surfaces pubescent with sessile, pectinate trichomes, 0.1-0.4 mm, (their long axis parallel to prominent abaxial midvein), sometimes glabrous adaxially. Cauline leaves 0. Racemes 4-12 (-17)-flowered, ebracteate, elongated in fruit; rachis not flexuous, glabrous or pubescent as stem. Fruiting pedicels divaricate-ascending, straight, (2-)3-10 (-13) mm, glabrous or sparsely pubescent, trichomes pectinate. Flowers: sepals ovate, 1.5-3 mm, glabrous or sparsely pubescent, (trichomes pectinate, 2-rayed, or simple); petals usually yellow, rarely creamy white, obovate, 2.5-4 × 1.5-3 mm; anthers ovate, 0.4-0.5 mm, (not producing pollen). Fruits ovoid to lanceolate, plane, inflated at least basally, sometimes slightly flattened distally, 3-6(-7) × 2-3.5(-4) mm; valves usually puberulent, rarely glabrous, trichomes simple and sessile, often unequally 2-rayed, 0.07-0.35 mm; ovules 6-12 per ovary; style 0.1-0.8(-1.1) mm. Seeds ovoid, 1.1-1.5 × 0.7-1 mm. 2n = 32, 64.

  • Provided by: [B].Flora of North America @ efloras.org
    • Source: [
    • 1
    • ]. 

     Information From

    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    Flora of North America @ efloras.org
    'Flora of North America @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=1 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • B Flora of North America Association
    World Flora Online consortium
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).