Draba borealis DC.
  • Syst. Nat.


Cite taxon page as 'WFO (2020): Draba borealis DC. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000655046. Accessed on: 03 Apr 2020'

General Information

Perennials; caudex branched (branches usually slender, elongated, rhizomatous, some-times with persistent leaf bases); not scapose. Stems usually unbranched, rarely branched, (0.4-)1-3.6 (-5.5) dm, often hirsute proximally, trichomes usually simple and 2-rayed, 0.5-1.1 mm, with short-stalked, 3-8-rayed ones, 0.1-0.4 mm (rarely simple trichomes absent distally). Basal leaves rosulate; blade ovate or obovate to oblanceolate, (0.5-)1-4.2(-6) cm × 3-10(-25) mm, margins dentate or denticulate, surfaces pubescent, trichomes short-stalked, cruciform, or (2-)4-6-rayed, 0.2-0.6 mm (principal rays usually simple, rarely 1 or 2 with a lateral branch, sometimes appearing to 10-rayed). Cauline leaves (2 or) 3-7(-12); sessile; blade ovate, margins entire or dentate, surfaces pubescent as basal or adaxially with some simple trichomes. Racemes (6-)8-20(-35)-flowered, ebracteate, elongated in fruit; rachis not flexuous, pubescent as stem. Fruiting pedicels divaricate or ascending, straight, (2-)4-8(-13) mm, pubescent as stem. Flowers: sepals ovate, 2-3 mm, pubescent, (trichomes simple); petals white, obovate, 4-6 × 2-3 mm; anthers ovate, 0.3-0.5 mm. Fruits ovate to broadly oblong or lanceolate, slightly twisted or plane, flattened, (5-)7-12 × 2.5-4.5 mm; valves pubescent, trichomes simple and short-stalked, 2-4-rayed, 0.1-0.4 mm; ovules 16-28(-30) per ovary; style 0.2-0.6(-0.8) mm, glabrous. Seeds oblong, 1-1.5 × 0.7-1 mm. 2n = 64, 80.

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

     Information From

    Brassicaceae
    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    Flora of North America @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=1
    '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
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).