Erect urticating perennial herb, pilose stems with stinging hairs, sometimes twining with serrate leaves 40mm x 16mm pubescent with bristles both surfaces, inflorescence to 130mm long with bracts to 3mm long, male flowers to 1.5mm with 3 pilose sepals, female calyx with 6 pilose segments, fruit a 3-lobed pilose capsule 6mm x 9mm