16. Lepidium apetalum Willdenow, Sp. Pl. 3: 439. 1800.
独行菜 du xing cai
Lepidium chitungense Jacot.
Herbs annual or biennial, (5-)10-25(-40) cm tall, puberulent with clavate or capitate trichomes. Stems erect, branched basally and above. Petiole of basal leaves (0.5-)1-3 cm; leaf blade oblong, lanceolate, or oblanceolate, 1.5-4(-5) × 0.7-1.2(-1.5) cm, pinnatifid, sinuate, or dentate. Upper cauline leaves sessile; leaf blade narrowly lanceolate, linear-oblong, or linear, 0.6-3(-4) cm × 1-3(-5) mm, base subauriculate or sometimes cuneate, margin remotely serrate or entire, apex acute to subobtuse. Fruiting pedicels slender, often recurved, 2-4(-5) mm, puberulent only adaxially with clavate or capitate trichomes, slightly flattened or narrowly winged. Sepals caducous, oblong, 0.7-0.8 × 0.3-0.4 mm, glabrous or puberulent, white at margin and apex. Petals absent, or rudimentary, linear, ca. 0.3 mm. Stamens 2; filaments 0.7-0.8 mm; anthers broadly ovate, 0.1-0.2 mm. Fruit broadly elliptic, 2.2-3.1 × 1.7-2.3 mm, widest at middle, apex narrowly winged; apical notch 0.1-0.3 mm; style 0.05-0.15 mm, included in apical notch. Seeds reddish brown, ovate-oblong, 1.1-1.3 × 0.6-0.8 mm, wingless, finely papillate; cotyledons incumbent. Fl. Apr-Aug, fr. May-Sep.
Roadsides, slopes, waste places, ravines, plains, fields; 400-4800 m. Anhui, Gansu, Guizhou, Hebei, Heilongjiang, Henan, Hubei, Jiangsu, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Xinjiang, Xizang, Yunnan, Zhejiang [India, Japan, Kazakhstan, Korea, Mongolia, Nepal, Pakistan].
The above first record from Mongolia is based on Chaney 498 (US).