Erect annual of tropical central Asia and Africa having a pair of divergent spines at most leaf nodes WordNet 3.0 & Open English WordNet

Amaranthus spinosus, commonly known as the spiny amaranth, spiny pigweed, prickly amaranth or thorny amaranth, is a plant that is native to the tropical Americas, but is present on most continents as an introduced species and sometimes a noxious weed. Wikipedia

Species of plant Wikidata