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FNA | Family List | FNA Vol. 7 | Brassicaceae | Draba

101. Draba simmonsii Elven & Al-Shehbaz, Novon. 18: 326. 2008.

Draba alpina Linnaeus var. gracilescens Simmons, Vasc. Pl. Ellesmereland, 83, plate 6, figs. 1-3. 1906

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.


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