POACEAE 83 
the palea not inclosed.—Ten species, natives of the tropieal and temperate 
regions of both hemispheres. 
Spikelets mostly in pairs, evenly imbricate in 3 or 4 rows on one 
side of the rachis, abruptly .pointed. 1. E. colona. 
SERE tne irregularly crowded in the spike-like scarcely 1-sided 
ches, 
Leaf-sheaths smooth. . 
Sterile floret neuter. 2. E. Crus-galli. 
Sterile floret staminate. 3. E. paludigena. 
Leaf-sheaths, at least the lower ones, hispid or scabrous: ` . 
pa anic ea P dense mass of long-awned spikelets. 4, E. Walteri. 
1. E. colona (L.) L nk, kr eompressed, branching at the more or less 
decumbent base, as mu 80 cm. E Pu binder about 5 mm. wide, some- 
times barred with pu E -brown: 
usually 5—10, E red nearly “their 
ngth on stric spikelets 
, Mex., C. A., 
rus-galli (L.) Beauv. Stem usually 
L 
es 
er Fla. to S Calif., Mo., 
( S. A.) 
( 
RASS. )—-Waste-places, fields, and moist ground, eee the U. S. and S 
Can n—(Eu., W. I., oe pe A., a —An exotice form, E. Crus-galli edulis, 
2 mm. ong.—(JAPANESE BARNYARD-MILLET. BILLION- reed RASS.)—Was 
places, various provinees, Ala. to Tex. and Conn.—(ZE. I.)—Occasionally "a 
for forage. 
E. paludigena Wiegand. Stems eld net ee 1 to 1.5 m. tall: 
ae icles narrow, 20-30 cm. long: racem endi ostly simple: sterile 
floret staminate.—Ditches, marshes, and d. lace ‘often in shallow water, 
pen. Fla. 
. Walteri (Pursh) Heller. Stem 1-2 m. tal : ligule none: awns 2—4 em. 
long —Wet d v ome and ponds, various Pi iu Fla. to Tex., Wis., 
and Mass.— (W. I., Mez.) —Exceptional spec- i 
imens have glabrous or scabrous sheaths, E. | ii " 
sh. | 
longiaristata Na 
. 92. TRICHOLAENA Schrad. Peren- 
nials with rather open panieles of silky spike- 
lets pikelets on short capillary pedicels; 
first glume minute, villous; second glume and 
sterile lemma equal, raised on a stipe above 
the first glume, short-awned from a notched 
p 
with long silky hairs, - in a of the oni 
lemma well developed; fertile Jemma shorter 
than the spikelet, pa M boat-shaped, 
obtuse, the margins thin, not inrolled.—Fifteen species, natives of Africa. 
