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

28. Draba tibetica J. D. Hooker & Thomson, J. Proc. Linn. Soc., Bot. 5: 152. 1861.

西藏葶苈 xi zang ting li

Draba sikkimensis (J. D. Hooker & Thomson) Pohle var. chitralensis O. E. Schulz; D. thomsonii (J. D. Hooker & Thomson) Pohle; D. thomsonii var. lasiocarpa (Lipsky) Pohle; D. thomsonii var. leiocarpa (Lipsky) Pohle; D. tibetica var. chitralensis (O. E. Schulz) Jafri; D. tibetica var. duthiei O. E. Schulz; D. tibetica var. thomsonii J. D. Hooker & Thomson; D. tibetica var. turkestanica (Regel & Schmalhausen) O. E. Schulz; D. tibetica var. turkestanica subvar. leiocarpa O. E. Schulz; D. tranzschelii Litvinov; D. turkestanica Regel & Schmalhausen; D. turkestanica var. lasiocarpa Lipsky; D. turkestanica var. leiocarpa Lipsky.

Herbs perennial, 6-25 cm tall, densely cespitose, scapose. Caudex few to many branched, ultimate branches terminated in rosettes and covered with leaves of previous years. Stems erect, simple, densely tomentose with stellate trichomes, or glabrous throughout. Basal leaves rosulate, persistent; petiole to 1 cm; leaf blade oblanceolate to oblong, sometimes oblong-lanceolate, (0.4-)0.8-2.5(-3) cm × (1-)2-5(-7) mm, densely tomentose with short, 4-6-rayed stellate trichomes 1 or more rays of which forked or with a lateral branch on each side, base attenuate or cuneate, margin entire or rarely 1-toothed on each side, apex obtuse. Cauline leaves absent or 1, very rarely 2, sessile; leaf blade oblong, 0.5-1.5 cm × 1-2 mm, tomentose as basal leaves, margin entire, apex obtuse. Racemes 5-9(-13)-flowered, ebracteate, elongated considerably in fruit. Fruiting pedicels (0.5-)0.7-1.8(-2.2) cm, ascending to suberect, straight, tomentose all around. Sepals ovate or oblong, 2-3 × 0.7-1.2 mm, erect, abaxially sparsely pubescent, base of lateral pair not saccate, margin narrowly membranous. Petals yellow, sometimes drying white, obovate, 3.5-5 × 1.5-2.5 mm, apex subemarginate or rounded. Filaments 2-3.5 mm; anthers ovate, 0.3-0.4 mm. Ovules 18-24 per ovary. Fruit oblong, oblong-linear, or narrowly lanceolate, (0.7-)0.9-1.7 cm × 1.5-2.5(-3) mm, not inflated, latiseptate, twisted or not; valves puberulent with predominantly stellate and fewer forked trichomes, not veined, base obtuse, apex subacute; style 0.4-0.8 mm. Seeds brown, oblong, 1-1.5 × 0.6-0.9 mm. Fl. and fr. Jun-Aug.

Mountain slopes, shrubby areas; 2500-4600 m. Xinjiang, Xizang [Afghanistan, Kashmir, Kazakhstan, Kyrgyzstan, Pakistan, Sikkim, Tajikistan].


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