Identifying the weedy amaranths (Amaranthus, Amaranthaceae) of South America

Abstract

Background Amaranthus is a genus of Amaranthaceae with ca. 75 species. Many of them are of economic importance as cultivated crops (grains or vegetables) or ornamentals, while around 20 range from significant weeds to minor ones. Objective: List and differentiate the species (and subspecies) of weeds that belong to genus Amaranthus and range in South America. Results: Thirteen species and four subspecies of Amaranthus are considered weeds in South America; six of them are of great importance (A. blitum, [...]

Topics & Concepts