What is "alternanthera"

n. Any of the genus (taxlink Alternanthera genus noshow=1) of herbaceous plants in the amaranth family.

Alternanthera is a genus of flowering plants in the amaranth family, Amaranthaceae. It is a widespread genus with most species occurring in the tropical Americas, and others in Asia, Africa, and Australia. Plants of the genus may be known generally as joyweeds, or Joseph's coat. Several species are notorious noxious weeds.