WOOTON AND STANDLEY—FLORA OF NEW MEXICO, 55 
first reduced to a ring at the articulation, the second equaling the lemma, membrana- 
ceous, more or less acuminate; lemma slightly indurated, mucronate or shortly awn- 
pointed; palea shorter than the lemma; stamens 3; styles distinct; grain included 
within the hardened lemma, free. 
1. Eriochloa polystachya H. B. K. Nov. Gen. & Sp, 1: 95. pl. 31, 1816. 
Tyre Locauity: Near Guayaquil, Ecuador. 
Rance: Florida and Arizona to Mexico and Tropical America. 
New Mexico: Belen; Mesilla Valley; Pena Blanca; White Mountains. Moist 
ground, in the Lower and Upper Sonoran zones. 
16. PASPALUM L. 
Perennials, often stoloniferous, with flat leaves; spikelets 1-flowered, plano-convex, 
nearly sessile in 2 or 4 rows along one side of a continuous, narrow or dilated rachis, 
forming simple racemes, these either solitary or 2 or more, digitate or paniculate; 
rachilla jointed below the glumes; glumes awnless, obtuse, membranaceous, the first 
usually wanting (often present in P. distichum, shorter than the second); grain oblong, 
inclosed within the indurated lemma and palea, 
KEY TO THE SPECIES. 
Stems creeping, rooting at the nodes; inflorescence of 2 terminal 
spikes........2...002 22022 e eee ee eee eee eee eee 1. P. distichum. 
Stems not creeping, mostly erect, not rooting at the nodes; panicle 
of more than 2 scattered spikes. 
Spikelets on short pedicels; plants almost glabrous, the slender 
hairs mostly confined to the leaf margins............-- 2. P. ciliatifolium. 
Spikelets sessile or nearly so; plants more or less villous with 
stiff hairs all over the leaves.............--.---.----+- 3. P. bushit. 
1. Paspalum distichum L. Amoen. Acad. 5: 391. 1759. JOINT GRASS, 
Type LOCALITY: Jamaica, 
Rance: California and North Carolina to Florida; also in South America, East 
Indies, and Australia. 
New Mexico: Socorro; Kingston; Mangas Springs; Rincon; Cienaga Ranch; 
Apache Teju; Mesilla Valley; Organ Mountains. River valleys, especially in clay 
soil, in the Lower and Upper Sonoran zones. 
A common weed in irrigated fields, difficult to exterminate because of its long, 
creeping stems. 
2. Paspalum ciliatifolium Michx. Fl. Bor. Amer, 1:44. 1803. 
Paspalum setaceum ciliatifolium Vasey, Contr. U. 8, Nat. Herb. 3: 17. 1892. 
Type tocauiry: ‘‘Habitat in Carolina,” 
Ranae: New Mexico and Texas to New Jersey and Florida; also in Mexico and 
South America. 
New Mexico: Arroyo Ranch, near Roswell (Griffiths 5734). Dry soil, in the Upper 
Sonoran Zone. 
Sf 3. Paspalum bushii Nash in Britton, Man. 74. 1901. 
Type LocALITy: Missouri. 
Rance: Missouri to Kansas and eastern New Mexico. 
New Mexico: Northeast of Clayton; sands south of Melrose; Nara Visa. Plains, 
in the Upper Sonoran Zone. 
