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any of the approximately 200 species of perennial, sometimes tufted grasses in the genus Andropogon (family Poaceae), distributed throughout the temperate and tropical zones. The coarse plants have flat or folded leaf blades, solid or pithy stems, and flower spikelets clustered at the stem tips or in the leaf axils. The stems are often hairy, sometimes reddish or greenish in appearance. Several species have underground stems