Stems many, to 3 cm long, pubescent. Leaves tripinnatipartite, multiplanar; each primary lobe twice tripartite; petiole 5-27 cm long, glabrous except pubescent sheath; lamina 5-18 cm long, 2.5-9 cm wide; ultimate lobes erect, linear, 1-2 mm wide, acute, concave, shallowly reticulate, glabrous (not seen young). Inflorescence much exceeding foliage; spikes 10-15 cm long; flowers crowded; peduncle simple or sparsely branched, glabrous but puberulous towards base, 10-18 cm long; rachis very sparsely puberulous; bracts ovate, obtuse, spreading, 1-1.5 mm long, glabrous except ciliate margins. Perianth opening ±widely, glabrous; adaxial tepal 4.5-5 mm long, 2 mm wide; abaxial tepal 3.5 mm long. Stigma ovate, lobed to less than a third, 1 mm long, 1-1.2 mm wide, ±convex; ovary pubescent. Fruit obovoid, 6 mm long, shortly pilose.
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