Herbs (3.5-)8.4-22.8 cm tall. Stems brown pilose and papillose at leaf axils, elsewhere glabrous. Basal leaves with petiole (2.3-)9-13 cm; leaf blade reniform, (1.4-)3-5.2 × (1.7-)3-7 cm, abaxially and at sinus brown pilose and papillose, adaxially glabrous, margin shallowly 15-26-dentate, teeth retuse at apex. Cauline leaf 1; petiole 0.6-9 cm, sparsely brown papillose; leaf blade reniform, (1.1-)2-3.4 × (1.5-)4.1-5.2 cm, abaxially and at sinus sparsely brown papillose, adaxially glabrous, margin shallowly 22-29-dentate, teeth mainly not overlapping at margin and apex retuse. Cyme 3.3-4.3 cm; bracteal leaves reniform to flabellate, 0.7-2.8 × 0.8-3.5 cm, abaxially brown pilose, adaxially glabrous, brown papillose and pilose at sinus, margin shallowly 5-15-dentate, teeth retuse at apex. Pedicel 0.3-4 mm. Sepals subspreading, ± overlapping, broadly orbicular, ca. 2.1 × 2-3 mm, apex obtuse. Stamens shorter than sepals; filaments ca. 0.9 mm. Ovary semi-inferior; styles ca. 0.3 mm. Capsule ca. 3 mm, apex subtruncate, retuse; rostrums ca. 0.4 mm. Seeds dark brown, shiny, ovoid, 0.9-1 mm, smooth, glabrous. Fl. and fr. May-Oct.
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