Cardamine microzyga O. E. Schulz, Bot. Jahrb. Syst. 32: 545. 1903. TYPE: China, West Sichuan and Tibetan Frontier, Tachienlu, 9000-13,500 ft, A. E. Pratt 265 (holotype, B!; isotype, K!).

Cardamine prattii Hemsley & E. H. Wilson, Bull. Misc. Inf. Kew 1906: 153. 1906. TYPE: China, Sichuan, moist alpine meadows around Tatien Lu, Wilson 3199 (holotype, K!; isotypes, A, MO!, P!, US!).

Herbs, perennial. sparsely pilose. Rhizomes slender, to 15 cm or longer, 1–1.5 mm in diam., without stolons. Stems 10–30(–45) cm, erect, simple, ridged, pilose. Basal leaves rosulate, 2–11 cm; petiole 0.5–5 cm, ciliate; terminal leaflet obovate, 2–8(–13) ´ 2–7(–10) mm, petiolule 0.5–4 mm, pilose, base cuneate, margin 1–3-toothed on each side, apex acute, submucronate; lateral leaflets 5–11 pairs, obovate or ovate, pilose, asymmetric, slightly smaller than terminal lobe, sessile or rarely with a petiolule to 5 mm, base oblique to subcuneate, proximal margin 1- or 2-toothed, rarely 1-lobed, distal margin often entire, apex acute; cauline leaves 1–3, (2–)4–10(–25) cm; petiole 0.5–4(–9) cm, ciliate, not auriculate at base; terminal leaflet and 6–9 pairs of lateral leaflets similar in morphology to those of basal leaves. Racemes ebracteate, 10–20-flowered. Fruiting pedicels erect to erect-ascending, (0.7–)1–2 cm, slender, pilose. Sepals oblong or ovate, 2.5–4 ´ 1–1.7 mm, sparsely pilose or glabrous, margin membranous, base of lateral pair saccate; petals purple or rarely white, broadly obovate, 6.5–10 ´ 3–6 mm, cuneate into a clawlike base to 2 mm, apex rounded; median filament pairs 3.5–5 mm, flattened; lateral pair 2.5–3.5 mm; anthers narrowly oblong, 0.8–1.1 mm; ovules 10–14 per ovary. Fruit linear, 2.5–4 cm ´ 1.5–2 mm; gynophore 0.5–2 mm; valves smooth, glabrous; style 1–2.5 mm. Seeds brown, oblong, 1.8–2.1 ´ 1–1.3 mm, wingless.

Flowering: (Apr–)Jun–Sep.

Habitat: moist alpine meadows, streamsides.

Elevation: 2600–4600 m.

Distribution: China (Sichuan, Xizang).