亚麻荠 ya ma ji

Myagrum sativum Linnaeus, Sp. Pl. 2: 641. 1753; Camelina caucasica (Sinskaya) Vassilczenko; C. glabrata (de Candolle) Fritsch ex N. Zinger; C. pilosa (de Candolle) N. Zinger; C. sativa var. caucasica Sinskaya; C. sativa var. glabrata de Candolle; C. sativa var. pilosa de Candolle.

Herbs annual, (12-)30-80(-100) cm tall, glabrous or sparsely pubescent with small branched trichomes rarely mixed with fewer simple ones. Stems simple or branched above, often glabrescent. Cauline leaves lanceolate, narrowly oblong, or linear-lanceolate, middle ones (1-)2-7(-9) cm × 2-10(-15) mm, glabrescent or sparsely pubescent with primarily forked trichomes, base sagittate or strongly auriculate, margin entire or rarely remotely denticulate, apex acute. Fruiting pedicels (0.8-)1.2-2(-2.7) cm. Sepals 2-3 × 0.5-1 mm. Petals yellow, (3-)4-5.5 × 0.5-1 mm. Filaments 1.5-3 mm; anthers ca. 0.5 mm. Fruit obpyriform or broadly obovoid, 7-9(-10) × 4-5 mm, often subtruncate at apex; valves with a distinct midvein and less prominent lateral veins; style 1-2.5 mm. Seeds dark brown, oblong (1.5-)1.7-2.5(-3) × 0.7-1 mm. Fl. May-Jun. 2n = 40*.

Farms, grassy areas, fields; 1000-1900 m. Nei Mongol, Xinjiang [India, Kazakhstan, Korea, Mongolia, Pakistan, Russia, Tajikistan, Turkmenistan; SW Asia, N Africa, Europe; introduced in North America].