POACEAE 53 
sterile lemma about equal, acute or acuminate, the lemma usually enclosing a 
hyaline palea or sometimes staminate or 
flower: fertile lemma indurate, minutely 
papillose-rug mucronate or awned, the 
margins aie inrolled.—Fifteen species, 
in the warmer regions, but mostly Ameri- 
2 
1. E. Michauxii (Roem. & Schult.) A. 
about 5 mm. long. [E. mollis Michx. E. uC Vasey E. mollis longifolia 
Chapm. |—Wet soil, Coastal Plain, Fla. and S 
23. BRACHIARIA (Trin.) Griseb. Annuals or perennials, with terminal 
inflorescence of several racemes along a common axis: T dorsally com- 
pressed, solitary, rarely in pairs, subsessile, in two rows one side 
3-angled, sometimes narrowly winged rachis, the first glume -ee toward the 
axis; first glume short or nearly as long as the spikelets: second glume and 
sterile lemma about equal, 5- to 7-nerved, the lemma enclosing a hyaline palea 
and sometimes a staminate flower: fertile lemma indurate, usually papillose- 
rugose, the margins inrolled, the apex rarely mucronate or bearing a short awn. 
—Fifteen species, in the warmer regions of both hemispheres. 
Anastomosing veins of spikelet prominent. . B. extensa. 
Anastomosing veins of spikelet obscure or wanting. 2. B. plantaginea. 
1. B. extensa Chase. Plant annual, nearly E. throughout: stem branch- 
ing, decumbent and rooting at base, 40— p m. long: pag blades flat, mostly 
not over 10 em. long, 2m e , 
2—5, spreading, 3—7 ong, distant on ue 
the turgid fruit. [B. e ap em 
Moist fi 2 Coastal Plain, Fla. 
D ae ) 
2. B. irae a (Link) A. Hitehe. Dif- 
fers from B. ensa in having the anas- 
tomosing cM p the spikelet obscure or 
wanting the second gl and sterile 
le not pointed beyond the fr O 
moist ground, various provinces, Ga. to 
and N. J.—(Mez., S. A.) 
24. AXONOPUS Beauv. Our species stoloniferous or tufted glabrous 
perennials, with usually flat abruptly rounded or somewhat pointed leaf-blades, 
and 2—4 slender spike-like digitate racemes. Spi ike lets depressed biconvex, not 
turgid, oblong, usually obtuse, aed sessile and alternate in 2 rows on one 
side of a 3-angled rachis, the back of the fertile lemma turned from the axis: 
first glume wanting: second glume ae sterile lemma equal, the former without 
