HITCHCOCK—MEXICAN GRASSES. 237 
28. Paspalum crinitum Chase, sp. nov. 
Perennial, cespitose, leafy at the base; culms erect, slender, simple, 0.75 to 1 meter 
high, glabrous; sheaths mostly overlapping, the lower crowded, clothed with long gray 
hairs, the others densely and finely pubescent, the uppermost sometimes sparsely 
appressed-pubescent; ligule membranaceous, about 5 mm. long, nearly entire, rather 
firm; blades flat, stiffly ascending, densely and finely pubescent on both surfaces, 10 
to 25 cm. long, 4 to 7 mm. wide, the lower shorter, in age disarticulating from the 
sheath, the uppermost reduced to a point of the elongated sheath; panicle 10 to 20 cm. 
long, the axis slender, usually bearing a tuft of long white hairs in the axils of the 
racemes, otherwise glabrous; racemes 6 to 10, slender, finally spreading, distant, 
rarely approximate, the lower as much as 12 cm. long, occasionally compound; rachis 
slender, dark purple, bearing a few scattered hairs along the angles or glabrous; spike- 
lets in pairs, loosely imbricated, or at the very base scattered (the slender dark pedicels 
of the upper of the pair about 1 mm. long), light yellowish green or purple-tinged, 2.6 
to 2.8 mm. long, 1.3 mm. wide, elliptic, depressed-convex on the back; second glume 
and sterile lemma thin, equal, covering the fruit, 3-nerved, sparsely pilose with 
delicate hairs or glabrous; fruit pale, minutely papillose. 
Type in the U. S. National Herbarium, no. 824361, collected in alkaline meadows, 
Hacienda de Angostura, State of San Luis Potosi, Mexico, July 10, 1891, by C. G. 
Pringle (no. 3755) and distributed as ‘‘ Paspalum tenellum Willd.?” 
The spikelets of this species indicate affinity to P. lividum, but the habit is so different 
that it would seem to be but distantly allied to it. 
Rance: Highlands, San Luis Potos{ and Puebla. 
HERBARIUM SPECIMENS: 
San Luis Potosi: Hacienda de Angostura, Pringle 3755. 
PuEBLA: Without locality, Nicolas in 1909. 
29. Paspalum lividum Trin.; Scheele, Linnaea 26: 383. 1854. 
Type locality, ‘‘Ad Hacienda de la Laguna,”’ Veracruz, the type specimen collected 
by Schiede. 
Rance: Southern United States and the West Indies to South America. 
HERBARIUM SPECIMENS FROM MEXICO: 
SinaLoa: Culiacén, swampy places, Palmer 1552 in 1891; Brandegee in 1904. 
Coanulta: Saltillo, Palmer 338 in 1904. 
Nuevo Leén: Monterey, wet places, Pringle 2516; along irrigation ditch, [7itch- 
cock 5565. 
San Luis Poros{: CArdenas, in water of irrigation ditch, forming runners, Litch- 
cock 5740. 
Jauisco: Tequila, Palmer 206 in 1886. Guadalajara, Palmer 245 in 1886; mesa 
along ditch, road to Barranca de Oblatos, Hitchcock 7318. San Nicolas, 
prairie, Hitchcock 7182, 7197. Zapotlén, prairie along railway, Hitchcock 7147. 
Orozco, near large pond, Hitchcock 7382. 
Guanasuato: Acdmbaro, along railway, Hitchcock 6933. Irapuato, moist sandy- 
clay plain, Hitchcock 7388, 7404, 7409. 
QuERETARO: Querétaro, irrigation ditch, Hitchcock 5817, 5869. 
Hipauco: Ixmiquilpan, river banks, Rose, Painter & Rose 9059. 
Micuoachn: Urudpan, low ground along railway, Hitchcock 6992. Morelia, 
Arséne in 1909. 
PuEBLA: Mount Orizaba, Seaton 62. 
Veracruz: Orizaba, Bourgeau 2544; Botteri 110, 1286; Miiller 2061; roadside 
ditch, Hitchcock 6313. Tlacotalpan, Nelson 523. Cérdoba, weed in field, 
Hitchcock 6451. Jalapa, along railway, Hitchcock 6620. 
Moretos: Cuernavaca, hillside pasture, Hitchcock 6823; along railway, Hitchcock 
6880, 6881. 
