Herbs, ca. 80 cm tall. Rhizome short, stout. Leaves basal and cauline, trifoliolate; leaflets abaxially pale green, adaxially green, elliptic or oblong, sometimes narrowly ovate, 12-14 × 5-6 cm, membranous, abaxially sparsely white strigose or glabrous, adaxially glabrous, base cordate, apex acuminate or long acuminate, terminal leaflet with equal rounded lobes, lateral leaflets quite oblique with outer lobes large, acute and deltoid, inner lobes smaller and rounded, margin spinose-serrate. Flowering stem with 2 opposite, or 3 or 4 whorled, trifoliolate leaves. Inflorescence compound, many (300-400) flowered, ca. 25 × 15 cm, base of rachis with 1-5 peduncles 20-30-flowered, usually glabrous. Pedicel 5-10 mm, glabrous; bracts lanceolate, ca. 1 mm. Flowers minute, ca. 3 mm in diam. Outer sepals purplish red, oblong, ca. 3.5 × 1.5 mm; inner sepals white, lanceolate, ca. 3 × 1 mm. Petals pale yellow, oblong, saccate, 1.2-2 × 0.6-1 mm, without spur. Stamens ca. 3 mm; filaments ca. 1 mm; anthers valved. Pistil 5-7 mm; style 3-4 mm. Fruit unknown. Fl. Apr-May, fr. unknown.
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