42 POACEAE 
10. RYTILIX Raf. Much branched erect annuals with flat leaf-blades, 
h ous racemes single and more or less enclosed in the sheathing 
braet, ee somewhat clustered in the axils of the leaves. Spikelets awnless, in 
pairs, the rachis-joint and pedicel grown 
together, the two clasped between the edges 
of tl o 
spicuous, staminate. [ ochloa Kuntze] 
—Consists of the folowing species only: 
1. R. granularis (L.) Skeels. Stem 
much as 1 m. tall: leaf-sheaths papillose 
hispid: raceme 1-2 em. long. [Manisuris 
granularis Sw. Hackelochioa udin: 
Kuntze]—Pinelands, prair and waste 
grounds, v wes provinees, Fila. 75 Ga. to 
Ariz. Nat. I.— (W , C. A. 
S. A., O. W. E weed in PA pnm 
11. BLYONURUS Humb. & a Ereet moderately tall perennials with 
solitary spike-like racemes. Spikelets awnless, in pairs along a somewhat tardily 
disarticulating rachis, the joints and pedicels thickened and parallel, the sessile 
spikelets appressed to the concave side, the pedicellate spikelet staminate, simi- 
lar to the sessile one, the pairs falling with a joint of the rachis: first glume 
firm, somewhat coriaceous, with a line of bal- 
sam glands on the marginal nerves, the apex 
acute or acuminate, bifid: second glume simi- 
first: sterile and fertile lemmas 
hyaline: palea obsolete.—About 15 species, 
circumtropical—Important grazing grasses 
in tropical America. 
1. E. tripsacoides Humb. & Bo npl Stem 
0.6-1.2 m. tall: leaf-blades flat or involute, 
2—4 mm. wide, eee Dos on the upper 
surface below e 7—12 em. long: sessile 
Spikelet 6-8 mm. e mocks, pine- 
ands, prairies, and open grassy slopes, 
Coastal Plain, Fla. to Tex. and Ga.—(Mez., °C. A., S. A.) 
12. ANDROPOGON [Royen]L. Mostly slender perennials (in our range), 
with solid sometimes tufted e the spikelets arranged in racemes, these 
single, in pairs, or in 3's or the common pedunele per enclosed by a 
spathe-like sheath, these sheaths p numerous, forming a compound inflores- 
cence, usually narrow, but sometimes in dense subcorymbose masses. Spikelets 
in pairs at each node of an artieulate rachis, one sessile and perfect, the other 
pedicellate and staminate, neuter or reduced to the pedicel, the rachis and 
pedicels of sterile spikelet often villous, sometimes conspicuously so: glumes of 
fertile spikelet coriaceous, narrow, the first rounded, flat, or concave on the 
ck, several-nerved, the median nerve weak or wanting: sterile lemma hyaline: 
fertile lemma hyaline, narrow, entire or bifid, usually bearing a bent and twisted 
