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FOC | Family List | FOC Vol. 8 | Brassicaceae | Draba

4. Draba subamplexicaulis C. A. Meyer in Ledebour, Fl. Altaic. 3: 77. 1831.

半抱茎葶苈 ban bao jing ting li

Draba dasycarpa C. A. Meyer; D. hirta Linnaeus var. subamplexicaulis (C. A. Meyer) Regel.

Herbs perennial, (4-)10-25(-35) cm tall, cespitose. Caudex slender, few branched, ultimate branches terminated in rosettes, covered with leaf remains of previous years. Stems erect, simple, tomentose with sessile, stellate and forked trichomes occasionally mixed with fewer, slender, simple ones. Basal leaves rosulate, persistent; petiole to 6 mm, sometimes ciliate; leaf blade oblong, or oblanceolate, 0.5-3(-3.6) cm × (1-)2-6(-10) mm, tomentose with sessile, 4-rayed stellate trichomes 1 to all rays of which with 1 or 2 lateral branches, base attenuate to cuneate, margin 1-5-toothed on each side, rarely subentire, apex acute. Cauline leaves (2 or)3-5(-7), sessile; leaf blade ovate to oblong, rarely elliptic or lanceolate, 0.7-2.6(-4) cm × 2-6(-10) mm, pubescent as basal leaves, base obtuse or subamplexicaul, margin 1-5-toothed on each side, rarely entire, apex acute. Racemes (3-)7-18(-20)-flowered, ebracteate, elongated in fruit. Fruiting pedicels 2-8(-12) mm, erect-ascending, straight, glabrous or tomentose all around with subsessile, forked and stellate trichomes sometimes mixed with simple ones. Sepals oblong or ovate, 2-2.7 × 1-1.3 mm, erect, abaxially pilose, base of lateral pair not saccate, margin narrowly membranous. Petals white, spatulate, 3.5-5 × 1.5-2.5 mm, apex emarginate; claw 1-2 mm. Filaments 1.5-3 mm; anthers ovate, 0.4-0.5 mm. Ovules 30-40 per ovary. Fruit oblong-elliptic to narrowly oblong, 5-14 × 2-3 mm, erect and often appressed to rachis, latiseptate, not twisted; valves glabrous or puberulent with simple and forked trichomes, not veined, base and apex obtuse to acute; style 0.1-0.5 mm. Seeds brown, ovate, 0.9-1.1 × 0.5-0.6 mm. Fl. and fr. Jun-Jul.

Rocky slopes, gravelly areas; 2300-4600 m. Qinghai, Shaanxi, Sichuan, Xinjiang [Kazakhstan, Kyrgyzstan, Mongolia, Russia, Uzbekistan].


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