Cardamine nipponica Franchet & Savatier, Enum. Pl. Jap. 1: 281. 1879. TYPE: Japan, Kanga, Monte Hakousan, Ontake, Savatier 2804 (holotype, P!).

            Herbs, perennial, glabrous throughout. Rhizomes slender, many branched, with petiolar remains of previous years. Stems 3–10 cm, erect, 2- or 3-leaved. Basal leaves rosulate, (3 or)5- or 7-foliolate; petiole 0.7–2.5 cm; terminal leaflet suborbicular to broadly ovate or elliptic, 1.5–6 ´ 1–4 mm, base cuneate to obtuse, margin entire, apex acute and submucronate; lateral leaflets (1 or)2–4 pairs, subsessile, obovate, base cuneate, margin entire, slightly smaller than terminal one. Cauline leaves 3- or 5-foliolate; petiole 4–11 mm, base auriculate to amplexicaul; auricle lanceolate or toothlike, 0.2–2 ´ 0.1–0.4 mm, apex acute to subcaudate; terminal leaflet narrowly oblanceolate to linear, 2–10 ´ 0.5–1 mm; lateral leaflets 2 pairs, smaller than but similar to terminal lobe. Racemes ebracteate, 3–6‑flowered; rachis flexuous in fruit; fruiting pedicels divaricate to ascending, 3–8 mm, straight. Sepals oblong, 1.7–2.2 ´ ca. 0.8 mm; petals white, spatulate, 5–6 ´ ca. 1.5 mm, apex rounded; median filament pairs ca. 2.5 mm, lateral pair ca. 1.5 mm; anthers ovate, 0.4–0.5 mm; ovules 10–16 per ovary. Fruit linear, 1.5–3 cm ´ 0.8–1.2 mm; valves smooth, glabrous; style 0.8–2 mm. Seeds brown, oblong, 1–1.5 ´ 0.6–0.9 mm, apically winged.

Flowering: Jul–Aug.

Habitat: alpine slopes.

Distribution: Japan (Honshu), Taiwan.