Amaranthus L.
Erect or prostrate herbs. Fruit dry, membranous Amaranthus
Bracts with long prominent or rigid points, usually exceeding the styles. Fruit circumsciss.
Bracts with short points or none, shorter or not much longer than the perianth. Perianth segments usually 3, if 5 then fruit with 3 swollen styles. Fruit indehiscent or bursting irregularly.