Panicum pampinosum Hitchc. & Chase

Panicum pampinosum Hitchc. & Chase, Contr. U. S. Nat. Herb
15: 66. 1910.
Plants freely branching from the base; culms ascending from a decumbent base, branching at the lower and middle nodes, compressed, glabrous, or sparsely pilose below the panicle, the nodes pubescent; leaf -sheaths loose, papillose-hispid, ciliate; ligule of very stiff hairs 2-3 mm. long; blades 5-12 cm. long, 5-10 mm. wide, flat, scarcely narrowed at the rounded or subcordate base, sparsely pilose above, sparsely hispid beneath, the margin pilose and more or less undulate; panicles long-exserted, 6-15 cm. long, half to two thirds as wide, the branches solitary, the lower as much as 5-8 cm. long, often bearing a branchlet at base, stiffly ascending, bearing several, mostly short, appressed branchlets with rather crowded, short-pediceled spikelets; spikelets about 4 mm. long, 1.4 mm. wide, very turgid, pointed; first glume more than three fourths the length of the spikelet, pointed; second glume and sterile lemma subequal, exceeding the fruit and pointed beyond it, the sterile palea short; fruit 2.2 mm. long. 1.3 mm. wide, oval, an indistinct scar at the base.
Type locality: Wilmot, Arizona.
Distribution: New Mexico and Arizona to Guanajuato.