290 BOTANY. 
is supposed to be the Poa Andina of Nuttall, is exceedingly variable and 
puzzling. It embraces several varieties, two of which are represented in 
this collection, viz: Var. sprcata.—Radical leaves rigid, involute, scabrous, 
pungently pointed, 3 to 9’ long; panicle narrow and spike-like; branches 
sessile or nearly so.—Colorado, 1873 (1135, 1136, 1137). Var. MAJOR.— 
Panicle oblong; branches short; flowers larger and paler.—Arizona, 1872 ; 
Colorado, 1873 (1133, 1134). 
Poa Tenvirouia, Nutt. (Watson’s Botany 40th Parallel, Synopsis Flora 
of- Colorado).—This species presents a great variety of forms, some of 
which may yet require to be made distinct species. ‘The general characters 
may be stated as follows: culms tufted, 1-2$° high, stout or slender, 
glabrous or with the leaves and sheaths more or less scabrous; leaves 
narrowly linear, 1-10’ long, ligule short or elongated ; panicle. erect or 
slightly bending, narrow or somewhat open and spreading, 2-6’ long; 
branches 2-5 together, scabrous, of unequal length; spikelets 2—-5-flow- 
ered, glumes keeled, lanceolate or ovate-lanceolate, acute, scarious-mar- 
gined, upper one 3-nerved, lower 1-nerved; flowers very narrow, linear or 
linear-lanceolate, scarcely keeled, convex on the back, obtuse or acutish, 
scarious, and bronze-tinged at the apex, puberulent or finely pubescent, 
obscurely nerved, not webbed; flowers readily separating at the joints. 
The grain is extensively gathered by the Indians for food. The following 
forms or varieties occur in the collection: Var. R1erpa, Nevada, 1872, 
Colorado, 1873 (1138 and 1140); var. ELoneaTa, panicle linear, 5-6 inches 
long; Nevada, 1872; Colorado, 1873 (1141). 
Poa pratensis, L.—Colorado, 1873 (1125); Santa Fé, N. Mex., 1874 
(19); and, what seems to be a slender form, in bogs, Twin Lakes, Colo- 
rado, 1873 (1131). 
Poa serotins, Ehrh—Twin Lakes, Colorado, 1873 (1130) ; also var. 
LAXICAULE, T'win Lakes, Colorado, 1873. 
Poa casita, Sm.?, var. r1emA.—Mosquito, Colorado, 1873 (1142); 
South Park, Colorado, 1873 (1143). 
Poa taxa, Heenke?—Colorado, 1873 (1128). Var. minor, Hall’s 
post-office, Colorado, 1873 (500, J. Wolf). 
Poa FLEXUOSA, var. OCCIDENTALIS—Twin Lakes, Colorado, 1873 
