Amaranthaceae >
Perianth segments scarious; filaments often connate at the base Amaranthaceae
Leaves opposite
Perianth segments, bracts and bracteoles rigid, acute, often spinescent
Perianth segments 5
Flowers in axillary clusters Alternanthera
Plants glabrous except the young tips of the branches and the nodes. Leaves linear-lanceolate or narrow-oblong to oblanceolate and obovate, from less than 1 to 6 cm long, up to 6 mm wide.