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

6. Draba mongolica Turczaninow, Bull. Soc. Imp. Naturalistes Moscou. 15: 256. 1842.

蒙古葶苈 meng gu ting li

Draba incana Linnaeus var. mongolica (Turczaninow) Regel; D. mongolica var. chinensis Pohle; D. mongolica var. elongata Pohle; D. mongolica var. trichocarpa O. E. Schulz; D. mongolica var. turczaninoviana Pohle.

Herbs perennial, (3-)5-15(-20) cm tall, cespitose. Caudex slender, few branched, ultimate branches terminated in rosettes, covered with petiolar remains of previous years. Stems erect, simple, tomentose with subsessile stellate trichomes. Basal leaves rosulate; petiole absent or to 1.2 cm; leaf blade lanceolate, 0.8-3 cm × 1-5 mm, tomentose with sessile, 4-rayed stellate trichomes the rays of which with 1 or 2 lateral branches, base attenuate to cuneate, margin entire or dentate, not ciliate, apex acute. Cauline leaves 6-14(-17), sessile; leaf blade ovate, oblong, or elliptic, 0.6-1.5 cm × 2-7 mm, pubescent as basal leaves, base cuneate to obtuse, margin entire or 1-6-toothed on each side, not ciliate at base, apex acute. Racemes 7-20-flowered, ebracteate or lowermost flowers bracteate, elongated slightly in fruit. Fruiting pedicels 1-5(-6) mm, divaricate, straight, tomentose all around with subsessile, stellate trichomes. Sepals oblong, 1-1.8 × 0.5-0.9 mm, erect, abaxially pilose, base of lateral pair not saccate, margin membranous. Petals white, spatulate, 2-3.5 × 1-1.3 mm, apex subemarginate or rounded; claw absent. Filaments 1-1.8 mm; anthers ovate, 0.1-0.2 mm. Ovules 12-18(-20) per ovary. Fruit narrowly oblong-ellipsoid to lanceolate-linear, (5-)6-8(-9) × (1-)1.5-2.5 mm, erect, latiseptate, flat or twisted to 1 turn; valves tomentose or glabrous, obscurely veined, base obtuse, apex acute or acuminate; style 0.1-0.3 mm. Seeds brown, ovate, 0.9-1.1 × 0.5-0.6 mm. Fl. and fr. Jun-Aug.

Crevices, grassy areas, slopes, river banks; 1700-4000 m. Gansu, Hebei, Heilongjiang, Jilin, Nei Mongol, Qinghai, Shaanxi, Shanxi, Sichuan, Xinjiang [Mongolia, Russia].

The above first record from Jilin is based on Anonymous 986 (PE), collected from Antu Xian. Draba mongolica was recorded from Xizang in FRPS and by Pohle (Repert. Spec. Nov. Regni Veg. Beih. 32: 78. 1925), but the present authors have not examined material from that autonomous region.


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