1. Lapsanastrum humile (Thunberg) Pak & K. Bremer, Taxon. 44: 19. 1995.
矮小稻槎菜 ai xiao dao cha cai
Prenanthes humilis Thunberg in Murray, Syst. Veg., ed. 14, 715. 1784; Lapsana humilis (Thunberg) Makino; L. musashiensis Hayata; L. parviflora A. Gray; Youngia humilis (Thunberg) Candolle.
Herb 10-50 cm tall, annual to ?short-lived perennial, rosulate, with a taproot. Stems few to several, slender, decumbent to ascending, branched in upper part, puberulent or glabrescent, almost leafless. Rosette leaves oblanceolate, 3.5-10[-26] × 1-2[-4] cm, lyrately pinnatipartite to pinnatisect, base attenuate into petiole-like basal portion, margin sinuate-dentate; lateral lobes 2-7 pairs, elliptic to ovate; terminal lobe ovate, irregularly rhombic, or broadly triangular, much larger than lateral ones, apex ± rounded and mucronulate. Stem leaves 1 or 2, similar to rosette leaves. Synflorescence laxly corymbose, with several capitula. Capitula nodding in fruit, with 15-20 florets; peduncle capillaceous, 0.5-4 cm. Involucre cylindric and 3-4 mm at anthesis, ovoid to subhemispheric and 4-5 mm in fruit. Outer phyllaries 3 or 4, triangular-ovate, ca. 1 mm; inner phyllaries 8. Achene brown, 2-3 mm, minutely papillose, without hooked apical projections of main ribs. Fl. and fr. Apr-Jun. 2n = 16.
Fields, wastelands, streamsides; 500-1000 m. Anhui, Fujian, Jiangsu, Zhejiang [Japan, Korea].