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Leaf blade 1–6 × 0.5–2.5 cm, ovate to ovate-lanceolate or narrowly lanceolate, acute or subacute at the apex, crenate-serrate to sharply serrate on the margins except at the base, truncate or subtruncate at the base, chartaceous, 3(5)-nerved from the base, sparingly finely puberulous on upper surface, setose along the midrib and main nerves beneath; lateral nerves in 5–7 pairs, scarcely prominent on leaf upper and lower surfaces.
Inflorescences up to 11 cm long, on peduncles up to 5 cm long, terminal or leaf-opposed, comprised mostly of male flowers with 2 female flowers at the base; axis pubescent and setose; male bracts 2 mm long, narrowly lanceolate, entire; male bracteoles 1 mm long, linear-lanceolate; female bracts and bracteoles 2–3 mm long, elliptic-lanceolate, sometimes denticulate.
Male flowers: pedicels 1 mm long; buds ellipsoid-subglobose; calyx lobes 1.5 × 1 mm, ovate, subacute, glabrous; stamens 3(4), 1 mm long; pistillode slightly raised, usually 3-radiate.
An erect, branched, urticating perennial herb up to 50 cm tall, monoecious; stems several from a woody rootstock, sparingly puberulous and stinging-setose.
Seeds 3.5 mm in diameter, globose, dark grey, mottled chestnut, ± smooth but white-papillose alongside the hilum.
Fruit 5 × 8 mm, 3-lobed, smooth, puberulous, densely setose on the keels.
Petiole 1–4 mm long, or leaves sessile.
Stipules 2–4 mm long, lanceolate.
