Amaranthus palmeri is a herbaceous annual plant in the amaranth family, Amaranthaceae. It is known by multiple common names including Palmer's Pigweed, Carelessweed and Palmer's Amaranth. Originating from Northern America, this species is considered highly competitive due to its fast-growing, vigorous nature. It has edible foliage including the leaves, stems and also the seeds, however it can be toxic to animals, particularly livestock. This is because it absorbs nitrogen readily and stores it in the leaves. In high doses, these nitrates can also be harmful to humans, the leaves also contain oxalic acid, which if consumed in excess, can be quite harmful.