Draba densifolia Nuttall in J. Torrey and A. Gray (Q3508)

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Draba densifolia is a taxon with the rank species within the genus Draba
Language Label Description Also known as
English
Draba densifolia Nuttall in J. Torrey and A. Gray
Draba densifolia is a taxon with the rank species within the genus Draba

    Statements

    taxon/id/Draba densifolia Nuttall
    0 references
    Draba densifolia Nuttall
    Draba densifolia
    Nuttall
    FNA Editorial Committee. 2010. Flora of North America north of Mexico. Volume 7: Magnoliophyta: Salicaceae to Brassicaceae. Oxford University Press, New York.
    accepted
    drave à feuillage dense (French)
    dense-leaved draba (English)
    Nuttall's draba (English)
    dense-leaved whitlowgrass (English)
    1 reference
    Moss, E.H. 1983. Flora of Alberta. 2nd edition, revised by J.G. Packer. University of Toronto Press, Toronto. 687 pp.
    1 reference
    Douglas, G.W., G.B. Straley, D.V. Meidinger & J. Pojar. 1998. Illustrated Flora of British Columbia. B.C. Ministry of Environment, Lands & Parks and B.C. Ministry of Forests. Victoria. Crown Publications. 8 vols.
    1 reference
    Cody, W.J. 2000. Flora of the Yukon Territory. 2nd ed. National Research Press, Ottawa. 669 pp.
    Flowering Jun–Aug.
    rock outcrops
    rocky knolls
    alpine ridges
    Stems unbranched, (0.05–) 0.2–1 (–1.7) dm, usually glabrous, rarely pubescent, trichomes usually simple, 0.3–0.8 mm, and 2–4 (or 5) -rayed, 0.1–0.6 mm, (rarely predominantly simple ones).
    blade linear to oblong or oblanceolate-linear, 0.3–0.9 (–1.4) cm × 0.5–1.5 (–2) mm, margins entire, (ciliate, trichomes simple, 0.3–1.2 mm), surfaces glabrous or sparsely pubescent, abaxially with short-stalked, 2–4-rayed trichomes, 0.1–0.3 mm (midvein prominent), adaxially rarely with subapical, simple trichomes.
    Racemes 2–10 (–22) -flowered, ebracteate, not or slightly elongated in fruit;
    Fruiting pedicels divaricate-ascending to ascending (not decurrent basally), straight, (0.7–) 1.5–10 (–25) mm, usually glabrous, rarely sparsely pubescent, trichomes predominantly simple (0.2–0.7 mm), sometimes 2–4 (or 5) -rayed, (0.1–0.5 mm).
    Flowers: sepals ovate, 2–3 mm, usually sparsely pubescent, rarely glabrous, (trichomes simple and short-stalked, 2–4-rayed);
    petals pale-yellow (sometimes fading white), oblanceolate to obovate, 2–5 × 1–1.7 (–2) mm;
    anthers ovate or oblong, 0.4–0.6 mm.
    Fruits ovoid or ovatelanceolate, plane (not curved), flattened, (2.5–) 3–6 (–8) × 2–3 mm;
    valves pubescent or puberulent, trichomes simple and short-stalked, 2–5-rayed, 0.1–0.4 mm;
    ovules 4–12 per ovary;
    style 0.3–0.6 (–1) mm.