54 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
many miles. It is probably the second most valuable range grass of New Mexico, 
being an excellent forage plant, very persistent, and not easily killed by overstocking. 
12. VALOTA Adans. 
Tufted perennials with flat leaves and narrow or contracted, densely hairy pani- 
cles; spikelets numerous, articulated below the glumes, 1-flowered; glumes mem- 
branous, densely silky-pilose or long-ciliate on the margins, often acuminate, some- 
times with a short bristle at the apex; lemma chartaceous, glabrous and shining, 
finally indurated; stamens 3; styles distinct. 
1. Valota saccharata (Buckl.) Chase, Proc. Biol. Soc. Washington 19: 188. 1906. 
Panicum lachnanthum Torr. U.S. Rep. Expl. Miss. Pacif. 73: 21. 1856, not Hochst. 
1855. 
Panicum saccharatum Buckl. Prel. Rep. Geol. Agr. Surv. Tex. App. 2. 1866. 
Trichachne saccharatum Nash in Small, Fl. Southeast. U. 8. 83. 1903. 
TypE Locauity: ‘‘Middle Texas.”’ 
RanGeE: Colorado and Texas to Arizona and Mexico. 
New Mexico: Albuquerque; Mangas Springs; Black Range; Dog Spring; Dona 
Ana and Organ Mountains; Causey. Dry hills and plains, in the Lower and Upper 
Sonoran zones. 
13. SYNTHERISMA Walt. 
Annuals with branched culms, thin flat leaves, and subdigitate inflorescence; 
spikelets 1-flowered, lanceolate-elliptic, sessile or short-pediceled, solitary or in 2’s 
and 3’s in 2 rows on one side of a continuous, narrow or winged rachis, forming slender 
racemes, these aggregated toward the top of the culm; glumes 1 to 3-nerved, the first 
sometimes obsolete; sterile lemma 5-nerved, the fertile indurated, papillose-striate, 
with a hyaline margin. 
1. Syntherisma sanguinale (L.) Dulac, Fl. Haut. Pyr. 77. 1867. CRABGRASS, 
Panicum sanguinale L, Sp. Pl. 57. 1753. 
Digitaria sanguinalis Scop. Fl, Carn, ed. 2. 1: 52. 1772. 
Tyre Locauity: ‘‘ Habitat in America, Europa australi.”’ 
RanGeE: Cultivated and waste grounds in nearly all parts of the United States, 
introduced from Europe. 
New Mexico; Galisteo; Animas Creek; Deming; Mesilla Valley; Guadalupe 
Mountains. 
14, LEPTOLOMA Chase. 
Tufted perennials with flat leaves and diffuse terminal panicles, these breaking 
away at maturity and becoming ‘‘tumbleweeds;” spikelets 1-flowered, fusiform, 
solitary on long capillary pedicels; first glume obsolete or minute, the second 3-nerved, 
nearly as long as the 5 to 7-nerved sterile lemma; fertile lemma indurated, papillose, 
with a hyaline margin, this not inrolled; grain free. 
1. Leptoloma cognatum (Schult.) Chase, Proc. Biol. Soc. Washington 19: 92. 1906. 
FALL WITCH GRASS. 
Panicum cognatum Schult. Mant. 2: 235. 1824. 
Panicum autumnale Bosc; Spreng. Syst. Veg. 1: 320. 1825. 
Tyre Loca.ity: ‘In Carolina.”’ : 
Rance: New Hampshire and Florida to Minnesota, New Mexico, and Mexico. 
New Mexico: Organ Mountains; Knowles; Buchanan; Tortugas Mountain; 
Roswell. Dry soil, in the Lower and Upper Sonoran zones, 
15. ERIOCHLOA H. B. K. 
Annuals or perennials with usually flat leaves and terminal panicles composed of 
numerous somewhat one-sided racemes; spikelets 1-flowered, hermaphrodite; rachilla 
jointed below the glumes and expanded into a distinct ringlike callus; glumes 2, the 
