西伯利亚离子芥 xi bo li ya li zi jie

Raphanus sibiricus Linnaeus, Sp. Pl. 2: 669. 1753; Chorispora gracilis A. Ernst.

Herbs annual, (3-)7-22(-35) cm tall, with multicellular glandular trichomes, these sometimes mixed with simple ones to 2 mm. Stems ascending, branched basally and above. Basal leaves not rosulate; petiole (0.5-)1-2(-3) cm, often ciliate; leaf blade oblanceolate or oblong, (1.5-)2-4(-6) cm × 4-10(-15) mm, glandular, base cuneate or attenuate, margin sinuate-dentate or pinnatisect, with oblong or lanceolate lobes, apex acute. Cauline leaves similar to basal ones, progressively reduced in size upward, uppermost often subsessile. Flowers in racemes. Fruiting pedicels slender, (6-)7-10(-14) mm, divaricate, slightly recurved, glandular. Sepals narrowly oblong, 3-4-(5) × 1-2 mm. Petals bright yellow, broadly obovate, 7-9(-12) × 3-4(-5) mm, emarginate at apex; claw 4-5 mm. Filaments 3-5 mm; anthers narrowly oblong, ca. 1.5 mm. Fruit linear-cylindric, 1.4-2(-2.5) cm × 1.5-2 mm, slightly curved upward, strongly torulose and with 6-12 constrictions on each side, glandular or rarely glabrescent; style (3-)5-9 mm. Seeds brown, oblong, 1-1.2 × 0.6-0.9 mm. Fl. Apr-Aug, fr. Jun-Sep.

Roadsides, fields, river beaches, grassy slopes; 700-3800 m. Xinjiang, Xizang [India, Kashmir, Kazakhstan, Kyrgyzstan, Mongolia, Pakistan, Russia].