2. Sisymbrium loeselii Linnaeus, Cent. Pl. I. 18. 1755.
新疆大蒜芥 xin jiang da suan jie
Sisymbrium loeselii var. brevicarpum Z. X. An.
Herbs annual, (20-)35-120(-175) cm tall. Stems erect, branched above, usually densely hispid below with retrorse trichomes, usually glabrous above. Basal leaves rosulate; petiole 1-4(-5) cm; leaf blade broadly oblanceolate in outline, runcinate- to lyrate-pinnatifid, (1.5-)2.5-8(-12) × (1-)2-5(-7) cm; lateral lobes 2-4 on each side of midvein, much smaller than terminal, entire or dentate; terminal lobe triangular, often hastate. Uppermost cauline leaves entire or toothed, much smaller than basal. Fruiting pedicels divaricate or ascending, slender, narrower than fruit, 0.5-1.2(-1.5) cm. Sepals oblong, ascending, 3-4 × 1-1.5 mm. Petals yellow, spatulate, 6-8 × 2-3 mm; claw subequaling sepals. Filaments yellowish, erect, 3-4.5 mm; anthers oblong, ca. 1 mm. Ovules 40-60 per ovary. Fruit narrowly linear, stout, terete, 2-3.5(-5) cm × 0.9-1.1 mm, curved or straight; valves often glabrous, slightly torulose; style stout, 0.3-0.7 mm; stigma prominently 2-lobed; septum slightly membranous. Seeds oblong, 0.7-1 × 0.5-0.6 mm, inserted in depressions of septum. Fl. May-Sep, fr. Jun-Oct. 2n = 14.
Valleys, river banks, fields, roadsides, pastures, waste grounds, prairies, disturbed sites, railroad tracks; 300-2800 m. Gansu, Xinjiang [Afghanistan, India, Kashmir, Kazakhstan, Kyrgyzstan, Mongolia, Pakistan, Russia, Tajikistan, Turkmenistan, Uzbekistan; W Asia, E Europe].