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

45. Draba nemorosa Linnaeus, Sp. Pl. 2: 643. 1753.

葶苈 ting li

Draba nemoralis Ehrhart; D. nemorosa var. brevisilicula Zapalowicz; D. nemorosa var. hebecarpa Lindblom; D. nemorosa var. leiocarpa Lindblom.

Herbs annual, (3-)6-45(-60) cm tall. Stems erect to ascending, simple or branched a little above base, densely pubescent with a mixture of simple (to 1.3 mm), forked, and stalked or subsessile stellate trichomes, glabrous from proximal flower to apex. Basal leaves rosulate, often persistent through flowering or fruiting; petiole obsolete; leaf blade oblong-obovate or oblanceolate, (0.4-)1-3.5(-5) × (0.2-)0.5-1.5(-2) cm, sparsely or densely pubescent with stalked, forked and stellate trichomes with simple rays, base cuneate, margin dentate or denticulate, rarely subentire, apex obtuse. Cauline leaves (2 or)3-12(-15), sessile; leaf blade broadly ovate to oblong, (0.2-)0.5-1.8(-2.7) cm × (1-)3-10(-15) mm, abaxially pubescent as basal leaves; adaxially pubescent with primarily simple trichomes mixed with fewer forked ones, base cuneate to rounded, margin dentate or denticulate, apex obtuse or acute. Racemes (15-)25-60(-90)-flowered, ebracteate, elongated slightly or considerably in fruit. Fruiting pedicels 0.7-2.5(-3) cm, divaricate, straight, glabrous, filiform, longer than fruits. Sepals ovate, (0.7-)0.9-1.6 × 0.5-1 mm, suberect, abaxially sparsely pubescent with simple trichomes, base of lateral pair not saccate, margin not membranous. Petals yellow, spatulate, (1.2-)1.7-2.2(-2.5) × (0.4-)0.6-1 mm, apex emarginate; claw absent. Filaments (0.9-)1-1.7(-2) mm; anthers broadly ovate to subreniform, 0.1-0.2 mm. Ovules (30-)36-60(-72) per ovary. Fruit oblong or elliptic, (3-)5-8(-10) × 1.5-2.5 mm, slightly latiseptate, not twisted; valves glabrous or puberulent with simple, antrorse trichomes 0.05-0.2 mm, base and apex obtuse, often with a distinct midvein and anastomosing lateral veins; style obsolete, rarely to 0.1 mm. Seeds reddish brown, ovate, 0.5-0.7(-0.8) × 0.3-0.4(-0.5) mm. Fl. and fr. Mar-Jun. 2n = 16.

Grassy areas, roadsides, wet valleys, river banks, forest margins, streamsides, mountain slopes; near sea level to 4800 m. Anhui, Gansu, Guizhou, Hebei, Henan, Heilongjiang, Jiangsu, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Xinjiang, Xizang, Yunnan, Zhejiang [Afghanistan, Japan, Kashmir, Korea, Kazakhstan, Kyrgyzstan, Mongolia, Russia, Tajikistan, Turkmenistan, Uzbekistan; SW Asia, Europe, North America].


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