Shrub to 2.5 m high, straggling to erect, sometimes climbing, sparsely pubescent. Stems with lenticels. Leaves petiolate, ovate to lanceolate, obtusely acuminate; lamina to 12 cm long and 5 cm wide; margins irregularly crenulate; petiole to 1.5 cm long. Racemes to 30 cm long; pedicels to 5 mm long, each with a lanceolate bract and 2 bracteoles; male flowers usually on separate racemes or plants, sometimes both male and female flowers in the same raceme. Female flowers with or without staminodes; ovary a single oblique carpel covered with coarse straight hairs developing into hooked bristles; style 1.5 mm long, covered on the adaxial surface with weak hairs, persistent. Achene burr-like, c. 0.5 mm long.
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