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

44. Draba stenocarpa J. D. Hooker & Thomson, J. Proc. Linn. Soc., Bot. 5: 153. 1861.

狭果葶苈 xia guo ting li

Draba media Litvinov; D. media var. leiocarpa Lipsky; D. stenocarpa var. leiocarpa (Lipsky) L. L. Lou; D. stenocarpa var. media (Litvinov) O. E. Schulz; D. stenocarpa var. media subvar. leiocarpa (Lipsky) O. E. Schulz.

Herbs annual, (5-)12-45(-50) cm tall. Stems solitary or few from base, erect, simple or few branched near base, densely hirsute basally with subsetose simple trichomes to 1.5 mm, these rarely mixed with fewer, smaller, stalked forked trichomes, glabrous along distal half. Basal leaves rosulate, subsessile; leaf blade oblong-obovate to narrowly oblong, (0.5-)0.8-3.5(-4.2) cm × 2-8(-12) mm, abaxially densely subhirsute with long-stalked, 3- or 4-rayed stellate trichomes with simple rays, sometimes with a few simple trichomes, adaxially with predominantly simple trichomes mixed with fewer, stalked forked ones, base cuneate, margin entire or 1-3-toothed, ciliate with simple trichomes, apex subobtuse. Cauline leaves 2-5(-7), sessile, oblong-ovate to oblong lanceolate, with indumentum similar to basal leaves, margin entire or minutely 1-3-toothed, apex obtuse to subacute. Racemes (4-)10-50(-60)-flowered, ebracteate, elongated considerably in fruit; rachis straight. Fruiting pedicels (0.1-)0.5-1.8(-2.5) cm, divaricate, slightly curved upward or straight, slender, glabrous. Sepals ovate-oblong, 1.5-2 × ca. 1 mm, erect, abaxially hirsute with simple trichomes, base of lateral pair not saccate, margin narrowly membranous. Petals yellow, spatulate, 3-4 × 1-1.5 mm, apex subemarginate. Filaments 1.5-2 mm; anthers ovate, 0.2-0.3 mm. Ovules (32-)38-48 per ovary. Fruit linear, (0.6-)0.9-2(-2.5) cm × 1.5-2.5 mm, not inflated, latiseptate, not twisted, straight or slightly curved; valves antrorsely puberulent with simple trichomes rarely mixed with forked ones, very rarely glabrous, with obscure midvein, base and apex subobtuse; style 0.1-0.2 mm. Seeds brown, ovate, 0.7-1 × 0.4-0.5 mm. Fl. and fr. Jun-Aug.

River beaches, shady rocky areas, forest margins; 2500-5000 m. Gansu, Qinghai, Sichuan, Xinjiang, Xizang [Afghanistan, India, Kashmir, Kyrgyzstan, Kazakhstan, Pakistan, Tajikistan, Turkmenistan, Uzbekistan].

Glabrous fruits are extremely rare in Draba stenocarpa and have not been found among the Chinese material examined by the present authors. It is likely that records of such plants in FRPS and provincial Chinese floras are based on misidentified plants of other species, notably D. ladyginii. However, the latter species is perennial with white flowers and (4-)6-19(-26)-leaved stems.


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