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Monoec. herb with rather slender stems, simple to much-branched, up to 6 dm. tall, sparsely clad in stinging hairs. Lvs 2-5 × 2-5 cm., on petioles up to 7 cm. long, rather closely to sparsely clad in stinging hairs; lamina thin, ovate to broad-ovate to deltoid, glab. except for a few stinging hairs, truncate to subcordate at base, coarsely serrate-dentate, sts incised; teeth acute to apiculate, 4-mm. or more long, sinus obtuse to acute. Stipules up to 1 cm. long, us. entire. Spikes up to 2 cm. or more long, solitary or paired, either with ♂ above, ♀ below, or bearing one sex only; per. glab. or nearly so. Achenes 1-1·5 mm. long, pale brown.
A herb which keeps growing from year to year. It has slender stems which are often woody. They lie along the ground near the base then extend upwards. They grow 1 m high. The leaves are narrow and thin. There are teeth along the edge. The leaves are 5-15 cm long and armed with stinging hairs. The flowers are small. They are clustered on short stalks from the leaf bases. Male and female flowers are on separate plants. The seeds are light purple in colour.
Slender, erect or decumbent, monoecious herb, sparsely to moderately clothed in very shortly stalked stinging hairs, otherwise sparsely hairy or ± glabrous. Lvs ovate to deltoid, acute to acuminate, truncate at base, coarsely serrate to dentate, 4-10-(12) cm long. Stipules 4 per node, entire. Most racemes unisexual; ♀ racemes above ♂ on the stem.
