309 
Upper glume narrow, lanceolate or 
ovate-lanceolate, 3- nerved, equall- 
ing more than half the length of 
the spikelet : 
Spikelets 2-7-3-5 mm. long : 
Lateral nerves of the lower ; 
valve gathered to the margins, 
nerve; rac j 
numerous; plants coarsely 
hirsute : 
Spikelets acuminate, gla- 
brous or pubescent ; nerves 
of the lower valve smooth 
Spikelets acute or rather 
less acuminate than in D. 
marginata; nerves of the 
lower floret scabrid or 
scaberulous . 
Nerves of the lower mie 
closely and evenly distri- 
buted; racemes 2-3; peor 
slender, glabrous” - 
Spikelets 1-5-2 mm. long : 
Culms about 3-noded ; leaves 
lanceolate, flat, up to 15 cm. 
long; racemes pera 5-12 
em. long 
Culms icc toad : Coos 
crowded, about 2-3 em. long ; 
racemes 2—4, 3-5 cm. long : 
Racemes usually 2; spike- 
lets 2mm. long - 
Racemes 3-4; spikelets 
1-5 mm. long - - 
Upper glume broad, rotundate, 
equalling about half, or less, the 
length of the spikelet, nerveless 
or the middle nerve obsolete : 
Lower valve 7-nerved ; es 
glume 6 mm. lon; 
Lower valve 3-nerved ; upper 
glume quite rudimentary - 
Spikelets densely hairy; indumentum 
usually much exceeding the spikelets : 
Lae ome a —_ coarse, rigid, 
e-like 
Spikelets not gibbous; Tale rey nb, 
soft and woolly 
rf 
oO 
be 
pont 
> 
— 
bo 
ww 
marginata. 
. sanguinalis. 
stenostachya. 
recta. 
- 11. didactyla. 
. tenuissima. 
13. diminuta. 
- 16. 
orbata. 
. gibbosa. 
Browne. 
