Species:
     Amaranthus albus   (amaranth, white pigweed)
     Amaranthus blitoides   (prostrate pigweed, mat amaranth)
     Amaranthus californicus   (California amaranth)
     Amaranthus hybridus   (smooth pigweed)
     Amaranthus powellii   (Powell's amaranth)
     Amaranthus retroflexus   (rough pigweed, redroot amaranth)