134 GRAMINEAE. 
Spikelets with 1 hermaphrodite flower and sometimes a male 
flower below; outer glumes 2 or 3, not awned, the lowest often 
very small rs as 4 Se a “4 
Stems weak, decumbent; leaves broad, ovate to lanceolate. 
Spikelets as in Panicum, but outer glumes awned i 
Spikelets enclosed, each one or 2-3 together, in an involucre of 
rigid spines or bristles, often connate into a cup below 
Stout wide-creeping sand-plant. Inflorescence dioecious; males 
in spikes clustered in heads; females in dense globular heads 
with long radiating pungent-pointed bracts A .. & SPINIFEx. 
. PaNIcUM. 
Or 
6. OPLISMENTS. 
7 
. CENCHRUS. 
Drviston B. POACEAE. 
Spikelets not articulated on the pedicel below the glumes, the rhachilla 
continuous with the pedicel, and the articulations above the outer glumes 
and frequently also between the flowering glumes. Flowers | to many, the 
lowest flower perfect, the uppermost often male or imperfect. (Lower 
flower imperfect in Phalarideae.) 
Trise IV. PHALARIDEIAE. 
Spikelets with 1 terminal hermaphrodite flower, with or without 1 or 2 male or 
rudimentary flowers below. Outer glumes 4, the lower 2 sometimes small, the 2 inner 
sometimes serving as flowering glumes for male flowers. 
First and second outer glumes smaller than the third and fourth. 
Flowering glumes obtuse .. ; 
* Ir .. 9. EnRHarta. 
First and second outer glumes minute, many times smailer than 
the third and fourth. Flowering glumes acute le .. 10. MicroLaENa. 
First and second outer glumes as large as the third and fourth, 
both of which usually contain a male Hower fs .. Ll. HiRocHLoe. 
Tribe V. AGROSTIDEAE. 
Spikelets 1-flowered; rhachilla frequently produced beyond the flower. Outer 
glumes 2, usually as long or longer than the flowering glume. 
Spikelets panicled. Outer glumes usually longer than the flower- 
ing, which are rigid and convolute and awned. Awn long, 
terminal, bent, usually twisted below the bend > -. 12.-STIPa. 
Panicle short and dense, cylindrical, bristly from the long awns. 
Flowering glume hyaline, 3-fid, middle lobe produced into a 
long awn. Rhachilla evidently produced she .. 13. EcHINOPOGON. 
Panicle dense, cylindrical. Outer glumes compressed, fringed on 
the keel. Flowering glume hyaline, with a short dorsal awn. 
Rhachilla not produced e wd ag’ .. 14, ALOPECURUS, 
Panicle long, narrow and spike-like in the New Zealand species. 
Spikelets small, awnless. Flowering glume usually exceeding 
the outer glumes. Seed loose in the pericarp and finally expelled 
from it .. ¥ AY < a os .. 15. SPOROBOLUS. 
Spikelets panicled. Outer glumes very minute. Flowering glume 
awnless, acuminate, pubescent. Palea almost as long as the 
glume ts iy. = *- 4:3] .. 16. Srmecicta. 
Spikelets small, panicled. Flowering glume hyaline, much smaller 
than the outer glumes, awned on the back or awnless. Palea 
usually short, often minute or wanting. Rhachilla not produced 17. AGRosTIs. 
Spikelets small, panicled. Flowering glume hyaline, smaller than 
the outer glumes or almost equalling them, awned on the back. 
Palea more than half as long as the flowering glume. Bhachilla 
produced beyond the palea, silky .. : Fight .. L8, DEYEUXIA. 
Panicle long, narrow, dense, bristly from the long awns. Flower- 
ing glume hardly shorter than the outer glumes, with a long 
and fine awn from the back near the tip ae we .. 19. DICHELACHNE. 
* 
