Differentiation of archaeological maize (Zea mays L.) from native wild grasses based on starch grain morphology. Cases from the Central Pampas of Argentina

► Morphological characterization of the starch of native wild grasses of Argentina. ► Comparison of native wild grasses to maize starch based on size and shape. ► Characterization of the starch of the Panicoideae subfamily, which includes maize.