*Amaranthus powellii
Bracts 5–6 mm long. Styles thick at the base. Stamens and perianth segments 3–5. Bracts c. 5 mm long with a very prominent midrib. Inflorescence stiff, with few branches, 5–8 mm diam. Perianth segments straight. Widespread but uncommon. Weed. Introd. from N. America