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Leaf blade 2–10 × 1–5 cm, ovate-lanceolate to lanceolate, acute or acutely to obtusely acuminate at the apex, serrate to crenate-serrate on the margins, usually narrowly and fairly deeply cordate at the base, membranous, 5–7-nerved from the base, evenly to sparingly pubescent, at least with urticating bristles along the midrib and main nerves beneath, sometimes also above; lateral nerves in 3–4 pairs, somewhat prominent above, prominent beneath.
Inflorescences up to 13 cm long, with the peduncle up to 8 cm long, terminal, axillary or leaf-opposed, bisexual; male bracts 3–4 mm long, linear-lanceolate, 2–3-flowered; male bracteoles 1–2 mm long, linear; female bracts 5 × 1 mm, lanceolate; female bracteoles resembling the male bracts.
An erect urticating perennial herb up to 75 cm tall, monoecious; stems few, branched, arising from a woody rootstock, indumentum a mixture of short soft hairs and longer stiffer hairs and sometimes with some stinging bristles.
Male flowers: pedicels 1–1.5 mm long; buds obovoid-subglobose, slightly apiculate; calyx lobes 2 × 1 mm, ovate, cucullate, subglabrous; stamens c. 1 mm long; pistillode 3-lobed, the lobes truncate.
Seeds 4 mm in diameter, globose, greyish-or pinkish-brown, mottled or flecked with dark brown or chestnut-brown, and with small circular grey patches ringed with white papillae.
Fruit 6 × 9 mm, 3-lobed, the keels shouldered, smooth, subglabrous, sparingly setose on the keels.
Stipules 3–5 mm long, lanceolate, acute, pubescent without, glabrous within.
Petioles short, 2–8(20) mm long.
