Andropogon bicornis L.

Andropogon bicornis I^. Sp. PI. 1046. 1753
Anatherutn hicome Beauv. Agrost. 150. 1812. Sorgum bicorne Kuntze, Rev. Gen. 791. 1891.
A tall usually much branched perennial, the branches repeatedly divided and borne in dense corymbiform masses. Stems I m. tall or more; leaf-sheaths glabrous; blades flat, 3-4 mm. broad, glabrous, or long-ciliate toward the base, those on the innovations up to 7 dm. long, those on the stem shorter; spathes 3-5 cm. long, brown, somewhat distant from the racemes or more or less enclosing them; racemes slender, the rachis capillary, the internodes and pedicels long-hairy, the former about as long as the sessile spikelets; sessile spikelet linear-lanceolate, 2.5-3.5 mm. long, the first scale with the callus sparsely barbed with hairs about one half as long as the scale, the fourth scale entire, acute, awnless; pedicellate spikelet usually reduced to a single scale, or rarely larger and staminate.
Type locality : Jamaica.
Distribution : Throughout tropical America.