Description from Flora of China
Sisymbrium mollipilum Maximowicz, Fl. Tangut. 1: 62. 1889; Arabidopsis qiranica Z. X. An; Microsisymbrium taxkorganicum Z. X. An; Neotorularia mollipila (Maximowicz) Z. X. An; Stenophragma mollipilum (Maximowicz) B. Fedtschenko; Torularia mollipila (Maximowicz) O. E. Schulz.
Herbs annual or rarely biennial, (3-)18-45(-60) cm tall, pubescent basally with a mixture of simple and 1- or 2-forked, short-stalked trichomes, pubescent apically with crisped forked trichomes or rarely glabrescent. Stems erect, simple or sometimes branched at base. Basal leaves withered by fruiting; petiole (0.5-)1-1.7(-3) cm, strongly flattened at base, ciliate with simple trichomes to 1.5 mm; leaf blade narrowly oblong or linear-lanceolate, (1-)2-4(-7) cm × 2-8(-12) mm, base cuneate, margin coarsely dentate or pinnatifid, apex acuminate. Middle cauline leaves subsessile or shortly petiolate, linear to linear-lanceolate, 1.5-5(-8) cm × 1-5(-10) mm, progressively reduced in size upward, margin entire or dentate, apex acuminate. Racemes ebracteate, elongated considerably in fruit. Fruiting pedicels erect, appressed to rachis, straight, stout, (0.5-)1-3(-4) mm. Sepals oblong, (1.5-)2-2.5 × 0.8-1 mm, scarious at margin, sparsely pubescent with crisped trichomes. Petals white or pink, oblanceolate, (2-)2.5-4 × (0.6-)0.9-1.2(-1.5) mm, clawlike base to 1.5 mm, apex obtuse. Filaments white or pink, (1.5-)2-3 mm; anthers oblong or subovate, (0.3-)0.4-0.6 mm, apiculate. Fruit (1.5-)3-5(-7) cm × 1-1.2 mm, erect, appressed to rachis; valves sparsely pubescent with finely branched, crisped, forked trichomes to 0.4 mm, rarely glabrescent; style obsolete or to 0.6 mm; stigma subentire or slightly 2-lobed. Seeds yellowish brown, oblong, 0.9-1.4 × 0.6-1 mm, slightly compressed, distal margin sometimes with a minute wing. Fl. Jun-Aug, fr. Jul-Sep.
Exposed banks, gravelly steep slopes, flood lands, alluvial plains, sandy or gravelly beaches, mountain valleys, grassy slopes, Juniperus woods; 2800-4500 m. Gansu, Qinghai, Xinjiang, Xizang [Kyrgyzstan, Tajikistan].