£7) 154 
is the celebrated “‘ Buffalo grass,”’ so called because it constitutes 
the chief fodder of the wild buffalo, during the season that 
it flourishes. I have retained this plant, for the present, where it. 
was placed by Mr. Nuttall, who noticed its anomalous characters. 
It differs from Sesleria, and indeéd from the Tribe Festucacee, in 
its habit, which is that of Chondrosium. The stem throws off s 
ers shih root at the joints, from whence leavesand culms of a ae 
‘inches in height are thrown up. The spikes are two or three in 
number, on short spreading peduncles. They are oblong, about 
half an inch in length, and obtuse; bearing from 6 to 8 spikelets, 
--which are unilateral, and form a double row on the rachis. The 
are very unequal, aie cree coriaceo , carin 
and one-nerved, the upper one slightly mucronate. Palea Pabloke. 
lanceolate, and somewhat keeled, membranaceous, nearly equal, 
. but longer than the Se eee ntire, glabrous except on the keel; 
the lower 3- nerved, the up i-carinate. Anthers large, linear, 
fulvous. In/all the being ofthis collection, as well as in those 
‘in my herbarium from numerous other localities, there are no fertile 
flowers, and only in a few instances rudimentary x ad so that the 
plant seems to be diecious or polygamous by abortio 
Arundo Phragmites, Linn. Valley of the Del Werle, and along 
the Gila. 
Andropogon argenteus, DC., Kunth. enum. 1, p. 500, Valley of 
the Gila. A handsome species, with the spikes in a terminal pani- 
which has a white appearance from the abundant silky hairs of 
e flowers. - 
A. macrourus, Michz. With the preceding. 
Besidesthese grasses, there were a few others, mostly collected 
in the valley of the Gila, but which I have not determined, as the 
specimens are not so complete as could be desired. Amon sbi = 
area Glyceria, two Agrostides, five species of Panicum ‘ia a Poa 
aaa ye te large elongated spikelets. Ip some parts of the — 
> -vall el Norte, Sorghum vulgare is cultivated, and was. 
and oe rap en - 
EQUISETACE. 
Basie —— Linn. Lower ipart of the Colorado. — “ 
3; avads tenerum, Sivahte. Valley of the Gila. This species 
ly spread over the southern part of North America, and yet 
hitherto obtained a place i in our Flora., We have it fr om 
na, Florida, Texas, and various parts of California. 
opodium. A small species allied to L, rupert: ea was found | 
in descending the Gila. It differ: s incurv es, whic 
mucronate. but wi it a Reb 33 at 
