Erect perennial to 50 cm high. Leaves varying from narrowly-elliptic to elliptic, subsessile, 2.5–5 mm long in the north, up to obovate, 10–40 mm long in the south, entire to strongly sinuate-dentate; upper surface glabrescent, lower surface scurfy to scaly. Male flowers in small glomerules 2–3 mm diam. in terminal axils. Female flowers in scattered axillary clusters. Fruiting bracteoles sessile, united into a swollen campanulate tube 1.5–2.5 mm long, or rarely tube narrowly deltoid and passing into a short stipe; apex truncate to rounded, entire or 3-toothed; appendages small and tooth-like, 1–4 on each face, or absent.
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