The lost crops of the Eastern Agricultural Complex.: a, Goosefoot (Chenopodium berlandieri). b, Sumpweed/marshelder (Iva annua). c, Little barley (Hordeum pusillum). d, Erect knotweed (Polygonum erectum). e, Maygrass (Phalaris caroliniana). Image in a courtesy of S.C.; images in b–e courtesy of N.G.M.