Stems many, to 28 cm long, sparsely branched or simple, pubescent, glabrescent. Leaves pinnatipartite, very undulate; lowest lobes 2-3-lobed; petiole 5-20 cm long, glabrous except villous sheath margins; lamina 3-7 cm long, 4-8 cm wide; ultimate lobes triangular, recurved, 2-4 mm wide, pungent, ±concave, shallowly reticulate, glabrous. Inflorescence much exceeding foliage; spikes to 15 cm long; flowers crowded but axis elongating; peduncle branched, to 35 cm long, glabrous except puberulous towards base; rachis puberulous; bracts ovate, obtuse, 0.8-1 mm long, spreading-puberulous. Perianth ascending, opening narrowly, glabrous; adaxial tepal 3.5-4 mm long, 1.5-1.8 mm wide, very convex; lateral tepals recurved; abaxial tepal 2.3-2.5 mm long. Stigma ±obtrapeziform to cordate, shallowly emarginate, 0.7-0.8 mm long and wide, ±flat; ovary pubescent in lower half. Fruit ±cylindrical, 5-6 mm long, glabrous.
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