194 CONTRIBUTIONS FROM THE NATIONAL 
Plants hermaphrodite; a tufted 
annual.............--.------ 
Spikelets in a more or less exserted 
inflorescence. 
Spikelets of two forms, perfect and 
sterile, in the same inflores- 
cence, fasciculate in small 
one-sided panicles. ........- 
Spikelets all alike in the same 
inflorescence. 
Styles wiry, spirally twisted, 
the long terete spikelets 
becoming entangled above; 
inflorescence an elongated 
one-sided raceme......... 
Styles not wiry nor twisted. 
Blades broad, ovate or ellip- 
tical, with fine transverse 
veins between the longi- 
tudinal nerves, petiolate; 
inflorescence paniculate. 
Spikelets several-flowered, 
the lower floret perfect, 
unlike the upper stam- 
inate florets; glumes 
broad at summit...... 
Spikelets 1-flowered, with a 
long prolongation of the 
rachilla; panicle capil- 
lary 
Blades linear, not transversely 
veined. 
Lemmas 3-nerved. 
Lemmas 3-toothed, pilose 
on the nerves and 
callus..........-... 
Lemmas glabrous, entire. 
Lemmas 65 to several- 
nerved. 
Plants dicecious. ....... 
Plants hermaphrodite 
(except in a few spe- 
cies of Poa). 
Spikelets broad, cor- 
date; lemmas cor- 
Spikelets not broad and 
cordate. 
Glumes large, scari- 
ous - margined, 
. membranaceous; 
upper florets 2 or 
3;lemmas empty, 
convolute around 
each other...... 
113. 
- 108. 
109. 
115. 
116. 
HERBARIUM. 
. Munroa (p. 355). 
. ACHYRODES (p. 372). 
STREPTOGYNE (p. 370). 
. SENITES (p. 368). 
. OnTHOCLADA (p. 370). 
TRIDENS (p. 356). 
ERAGROSTIS (p. 358). 
DisTIcHuis (p. 371). 
Briza (p. 371). 
. Meuica (p. 367). 
