304 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
2. Triniochloa micrantha (Scribn.). 
Avena micrantha Scribn. U. 8. Dept. Agr. Div. Agrost. Cire. 19: 3. f. 7. 1900. 
Type locality, ‘‘State of Morelos,’’ the type specimen collected at Sierra de Tepox- 
tlan by Pringle (no. 8018). 
RanGE: Known only from the type locality. 
HERBARIUM SPECIMENS: 
More os: Sierra de Tepoxtlaén, mossy cliffs, Pringle 8018, 9172, 11214. 
8. Triniochloa laxa sp. nov. 
Culms densely cespitose, lax, decumbent and rhizomatous at base, the old culms 
and leaves persistent; sheaths glabrous; ligule 1 to 3 mm. long; blades flat, scabrous, 
15 to 30 cm. long, 3 to 4 mm. wide, long-acuminate, smooth and green beneath, 
scabrous and glaucous above; panicles narrow, few-flowered, scarcely exceeding the 
upper leaves, the branches few, short and appressed, bearing 1 to 3 spikelets; spikelets 
excluding the awn about 15 mm. long; glumes narrow, gradually narrowed to the 
- acute apex, purple at base along the midrib, scarious, glabrous, the first 1-nerved, 
12 mm. long, the second 3-nerved, 15 mm. long; lemma mottled with purple, rounded 
on the back, about 14 mm. long, 5-nerved, the three central nerves passing into the 
dorsal awn, the other two extending into the 2 short teeth of the apex; callus densely - 
bearded with white hairs 3 to 5 mm. long; awn attached about the middle of the 
lemma and below the short teeth, about 15 mm. long, stout, bent about the middle, 
loosely twisted below; palea similar to the lemma, nearly as long. 
Type in the U. 8. National Herbarium, no. 691223, collected on rocky side of ravine, 
2,400 meters altitude, SAnchez, Chihuahua, Mexico, October 12; 1910, by A. S. Hitch- 
cock (no. 7687). 
RanGE: Known only from the type collection. 
65. LYCURUS H. B. K. Nov. Gen. & Sp. 1: 141. pl. 45. 1816. 
KEY TO THE SPECIES. 
First glume bearing a single awn about as Jong as the body of the 
lemma, and often a second shorter awn......-..--....... 2. I. phalaroides. 
First glume bearing 2 slender nearly equal teeth, exceeding the 
body of the lemma. 
Culms smooth.............2-2- 2-2 e cece eee ee eee e cece e ees 1. L. phleoides. 
Culms scabrous; blades firm, glaucous...............-..--.-- la. L. phleoides glau- 
ctfolius. 
1. Lycurus phleoides H. B. K. Nov. Gen. & Sp. 1: 142. pl. 45. 1816. 
Type locality, ‘‘in temperatis Mexici, inter Guanaxuato et Temascatio et in radici- 
bus aridissimi montis La Buffa.”’ 
RanaeE: Rocky Mountain region of the United States and south in the mountains to 
southern Mexico. 
HERBARIUM SPECIMENS FROM Mexico: 
Lower CALIFORNIA: Cape region, mountains, Brandegee in 1899. Sierra de la 
Laguna, Brandegee in 1893. 
Sonora: Los Pinitos, Hartman 230. 
Curnvuanva: Sénchez, rocky ravine, Hitchcock 7684; along railway, Hitchcock 7698. 
Chihuahua, rocky hill, Hitchcock 7793. Southwestern Chihuahua, Palmer 2 
in 1885. Mifiaca, rocky hill, Hitchcock 7740. Between Casas Grandes and 
Sabinal, Nelson 6356. 
Duranao: Durango, dry ground, Hitchcock 7605; rocky hill, Iron Mountain, 
Hitchcock 7637; hillsides, Palmer 526 in 1896. 
Coanuita: Chojo Grande, Palmer 339 in 1904. Jaral, Schumann 1725. 
ZACATECAS: Zacatecas, in gulches of dry sterile hill, Hitchcock 7496. Plateado, 
Rose 2794. 
