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Draba simmonsii
Family:
Brassicaceae
Simmons' Whitlow-Grass
[
Draba alpina var. gracilescens
Simmons]
FNA
Resources
Ihsan A. Al-Shehbaz, Michael D. Windham, Reidar Elven in Flora of North America (vol. 7)
Perennials;
caudex branched (with persistent leaf bases and petioles); scapose.
Stems
unbranched, (0.15-)0.3-1.1 (-1.3) dm, often pubescent throughout, sometimes sparsely pubescent distally, trichomes stalked, 2-4-rayed, and fewer, simple ones, 0.1-0.3(-0.6) mm.
Basal leaves
(not imbricate); rosulate; petiolate; petiole (base somewhat thickened), margin ciliate, (trichomes simple, 0.5-1 mm); blade oblong to oblong-lanceolate, 0.5-1.6 cm × 2-5 mm, margins entire (apex subacute to obtuse), surfaces pubescent throughout or glabrous adaxially, with simple and stalked, 2-4 (-6)-rayed, stellate to subdendritic trichomes.
Cauline leaves
0.
Racemes
(2-)4-10(-14)-flowered, ebracteate, slightly elongated in fruit; rachis not flexuous (straight), pubescent as stem.
Fruiting pedicels
divaricate, straight, 2.5-10 mm, pubescent as stem.
Flowers:
sepals (purplish green), oblong, (2.5-)2.8-3.5(-3.8) mm, pubescent, (trichomes simple and sometimes short-stalked, 2-rayed); petals pale yellow, narrowly obovate, (sides non-parallel), (3.5-)3.8-5.5(-5.8) × (2.5-)2.8-4(-4.6) mm, (emarginate); anthers ovate, ca. 0.5 mm.
Fruits
lanceolate, plane, slightly flattened, 5.5-9(-11) × 2.3-3.8 mm; valves pubescent, trichomes simple, sometimes with fewer, 2-rayed ones, 0.1-0.3 mm; ovules 16-24(-28) per ovary; style 0.1-0.3 mm (stigma as wide as style).
Seeds
(dark brown), oblong-ovate, 1-1.3 × 0.7-0.8 mm.
Flowering late Jun-Jul. Dry open ground, open patches in meadows or heath vegetation, outwash plains; 0-100 m; N.W.T., Nunavut.
Open Interactive Map
Click to Display
45 Total Images
This project made possible by National Science Foundation Awards
1601697
,
1600981
,
1601393
,
1600976
,
1601429
,
1601101
,
1601503
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