296 BOTANY. 
4-6” long—Gila Valley, Arizona, 1874 (334). Var. paucrIFLoRA much 
smaller and more delicate; leaves broader and shorter and not scabrous; 
panicle much smaller and looser, is 2096, C. Wright, N. Mex. Coll., 1851 and 
1852. 
Hetopus punycratus, Nees—This differs from Panicum in having 
clavate, torulose pedicels, and in the absence of the inferior glume. Culm 
erect, 2-3° from a decumbent base, somewhat pubescent at the nodes, 
ligule a short pubescent fringe; leaves lanceolate-linear, 6—10/ long, 3-5’ 
wide, smooth; panicle 6’ long, of 5-10 erect, sessile branches; axis and 
rays pubescent; pedicels clavate, with a short ring-like torus; spikelets 
13-2” long, acuminate, finely pubescent ; glume and sterile flower pointed ; 
perfect flower oval or oblong, mucronulate, punctate.—Cienega, Arizona, 
1874 (583). | , 
ANDROPOGON MACROURUS, Michx—Southern Nevada and Arizona, 
1871 and 1872. 
ANDROPOGON ARGENTEUS, Ell—Arizona, 1871 and 1872. ‘Sulphur 
Springs, Arizona, 1874 (547). 
ANDRoPOGON scoparius, Michx.—Black River Flats, Arizona, 1874 (790). 
ANDROPOGON ciLI4RIs, Trin. (Llionurus ciliaris, H. B. K.)—This belongs 
to a section of Andropogon which is distinguished by having the spikes 
solitary, lateral, and terminal. Root fibrous, red, aromatic ; culms ceespitose, 
ascending or erect (3-4°), compressed; ligules short, ciliate; leaves nar- 
rowly linear or filiform-involute, glabrous, or pilose below; spikes 2-4’ 
long, jointed; male spikelet with a short, ciliate, margined pedicel ; perfect 
spikelet sessile, the lower glume acutely bifid at the apex, white hairy 
externally.—Sanoita Valley, Arizona, 1874 (638). ? 
AnDRoPoGoN conTortus, L. (Heteropogon hirsutus, Pers.) —This belongs 
to the same section as the preceding. Culm erect, branching, 1-2°, 2- 
edged below; sheaths and nodes glabrous; ligule short, truncate, ciliate ; 
leaves flat, sharp-pointed, scabrous; spikes solitary; rachis and pedicel of 
the fertile flowers hirsute; outer glume of male flower acute and pilose ; 
awn long (3’).—Sanoita Valley, Arizona, 1874 (656). 
Soreuum nutans, Gr.—Sanoita Valley, Arizona, 1874 (689). 
IMPERATA aRUNDINACEA, Cyrill_—Spikelets in pairs, one sessile, the other 
