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|genus=Andropogon
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Andropogon (Greek, aner, man, and pogon, beard, referring to the silky hairs on the spikelets of some species). Gramíneae. Beard-grass. Annual or mostly perennial grasses of various habit but usually with coarse foliage, scarcely horticultural.
Spikelets in pairs at each joint of an articulate rachis, one sessile, perfect, 1-fld.; the other pedicelled, staminate, neutral or reduced to a pedicel; glumes of fertile spikelet equal, indurated, the first dorsally compressed, the second keeled; sterile and fertile lemmas hyaline, the latter usually awned; palea minute or wanting: rachis usually hairy, often conspicuously so.—A large genus of probably 200 species, widely distributed in both hemispheres except in the colder regions. Includes several important native forage grasses such as blue-stem or blue-joint (A. furcatus, Muhl.) with about 3 digitate spikes at the summit of the tall culm; and little blue- stem (A. scoparius, Michx.), with single spikes scattered along the branches, both species of the prairie region. Broom sedge (A. virginicus, Linn.), a common grass of the Atlantic states, is considered troublesome, though it has some forage value before it flowers. Some of the species, such as silver beard-grass (A. argenteus, DC.), are ornamental on account of the silvery panicles. This is a stout grass, 2-4 ft., with bearded nodes and long- stalked oval panicles consisting of numerous woolly ascending or appressed spikes.
Several species of oil-producing grasses formerly included in Andropogon are now referred to other genera. A. Nardus, Linn.-Cymbopogon Nardus, Rendle. A. citratus, DC.-Cymbopogon citratus, DC. A. Schoenánthus, Linn.-Cymbopogon Schoenanthus, Spreng. A. squarrosus, Linn. - vetiveria zizanioides, Nash.
For a discussion of the sorghums and Johnson-grass referred by some authors to Andropogon, see Holcus; also Vol. II, Cyclo. Amer. Agric.
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