Description from Flora of China
Hymenophysa pubescens C. A. Meyer in Ledebour, Fl. Altaic. 3: 181. 1831.
Herbs perennial, (10-)15-35(-50) cm tall, usually densely pubescent or puberulent with often curved trichomes. Stems erect, branched above. Petiole of basal and lower cauline leaves 0.5-1.5 cm; leaf blade oblanceolate or obovate, (1-)2-6(-7) × 0.3-2 cm, pubescent, base attenuate, margin sinuately lobed or dentate, apex obtuse or acute. Upper cauline leaves sessile; leaf blade oblong or lanceolate, 1-5(-8) × (0.3-)0.5-1.5(-3) cm, pubescent, base sagittate, margin dentate or subentire. Fruiting pedicels 3-6(-10) mm, slender, puberulent, divaricate. Sepals oblong, 1.5-2 × 0.7-1 mm, pubescent, margin white. Petals white, obovate, (2.5-)3-4 × 1-5 mm, base clawed, apex rounded. Filaments 2-2.5 mm; anthers ovate, 0.4-0.5 mm. Fruit globose to subglobose, (2-)3-4(-5) mm in diam., rounded at apex and base or slightly cordate basally; valves semiglobose, not keeled, inflated, often densely puberulent, rarely subglabrous, not veined or obscurely veined; style 0.7-1.5 mm, glabrous or sparsely puberulent proximally. Seeds brown or dark brown, ovoid, 1.5-2 × 1-1.5 mm. Fl. and fr. May-Jul. 2n = 16.
Presently treated by Ihsan Al-Shehbaz as Lepidium appelianum Al-Shehbaz (Novon 12(1): 7. 2002).
Along ditches, fields, pastures; 400-1600 m. Gansu, Nei Mongol, Ningxia, Qinghai, Shaanxi, Xinjiang [Kazakhstan, Kyrgyzstan, Mongolia, Pakistan, Russia, Tajikistan, Turkmenistan, Uzbekistan; naturalized in North and South America].