Sporobolus trichodes Hitchc.

Sporobolus trichodes Hitchc. Contr. U. S. Xat. Herb. 17: 311
1913.
Sporobolus capillaris Vasey, Contr. U. S. Nat. Herb. 1: 283. 1893. (Basis of 5. trichodes.) Not 5. capillaris Miq. 1851.
Perennial, glabrous throughout; culms cespitose, erect, 30-40 cm. high; ligule ciliate-erose, about 0.5 mm. long; blades flat or usually involute, especially the slender scabrous points, 4-S cm. long, the lower as much as 2 mm. wide, the uppermost culm-blade 3-4 cm. long; panicle oblong-elliptic, open, 10-15 cm. long, 2-4 cm. wide, the branches solitary or in pairs, somewhat
spreading, naked below, capillary, no short branches at base, the pedicels delicate, all spreading,
the ultimate lateral ones about as long as the spikelet or a little longer; spikelets brownish,
broad, 1.5 mm. long; glumes nearly equal, oblong, obtuse, 0.5 mm. long; lemma and palea
equal, obtuse; fruit flattened, smooth, brown, oblong-circular, nearly 1 mm. long, 0.7 mm. wide.
Type locality: Rio Blanco, near Guadalajara, Mexico (Palmer 512 in 1882). Distribution: Dry ledges and rocky hills, Chihuahua to Morelos and Jalisco.