90 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
New Mexico: Mesilla Valley. Wet ground. 
This grass, the largest of all those found in New Mexico, is frequent along ditches in 
the Rio Grande Valley, where it has probably been introduced. 
55. MUNROA Torr. 
Low, diffusely much branched annual with short sharp-pointed leaves clustered at 
the ends of the branches; spikelets 2 to 4-flowered, 3 to 5 together and nearly sessile 
in the axis of the floral leaves; rachilla jointed above the glumes; glumes lanceolate, 
acute, hyaline, l-nerved; lemmas longer, 3-nerved, entire, retuse, or 3-cleft, the 
midnerve or all the nerves excurrent as short mucronate points; palea hyaline, 
2-keeled; stamens 3; styles distinct, elongated; grain inclosed within the lemma, 
free, 
1. Munroa squarrosa (Nutt.) Torr. U.S. Rep. Expl. Miss. Pacif. 4: 158, 1856. 
Crypsis squarrosa Nutt. Gen. Pl. 1: 49. 1818. 
Type Locatity: “On arid plains near the ‘Grand Detour’ of the Missouri, almost 
exclusively covering thousands of acres.”’ 
Rance: Alberta and South Dakota to Arizona and Texas. 
New Mexico: Common throughout the State. Dry plains and low hills, in the 
Lower and Upper Sonoran zones. 
56. DASYOCHLOA Willd. 
Low, densely tufted, often creeping perennial, with very narrow, somewhat rigid 
leaves and crowded spikelets in clusters of 3 to 6, equaled or exceeded by the upper 
leaves; spikelets several-flowered, sessile; glumes unequal, keeled; lemmas thin, 
densely hairy below, deeply bilobate, awned from between the rounded lobes; sta- 
mens 3. 
1. Dasyochloa pulchella (H. B. K.) Willd.; Steud. Nom. Bot. ed. 2. 1: 484, 1840, 
Triodia pulchella H. B. K. Nov. Gen. & Sp. 1: 155. pl. 47. 1816. 
TyrE Locauity: “‘In subfrigidis, siccis, apricis regni Mexicani inter Guanaxuato, 
Mina de Belgrado et Cubilente, alt. 1050 hexap.” . 
Rance: Western Texas to Arizona, south into Mexico. 
New Mexico: Shiprock; Carrizo Mountains; Albuquerque; Mangas Springs; 
Socorro; Tortugas Mountain; Mesilla Valley; Orogrande; Roswell. Sandy mesas, in 
the Lower and Upper Sonoran zones. 
57. ERIONEURON Nash. 
Tufted perennials with thick linear leaves having white margins, and dense, con- 
tracted, almost capitate panicles; spikelets several to many-flowered; glumes narrow, 
acuminate; lemmas broad, 3-nerved, pubescent on the nerves below and sometimes 
on the body of the lemma at the base, the apex acuminate, entire or slightly 2-toothed, 
the awn terminal or arising between the minute teeth; stamens3; style short, distinct. 
1. Erioneuron pilosum (Buckl.) Nash in Small, Fl. Southeast. U. S. 144. 1903. 
Uralepis pilosa Buckl. Proc. Acad. Phila. 1862: 94. 1863. 
Steglingia pilosa Nash in Britt. & Brown, Illustr. Fl. 8: 504. 1898. 
Type Locauity: ‘Middle Texas.” 
RanGeE: Kansas and Colorado to New Mexico and Texas. 
New Mexico: Farmington; Pecos; Knowles; Torrance; Buchanan; Las Vegas Hot 
Springs; Cross L Ranch; Mangas Springs; Dayton; Gray; Guadalupe Mountains; 
Roswell. Dry hills and plains, in the Upper Sonoran Zone. 
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