CLVII. GRAMINEiE (Stapf). 
9 
Lower glume of both spikelets of each pair muti- 
cous, coriaceous near the keels, otherwise 
thinly chartaceous ; spikelets 1 -flowered ; 
racemes panicled, very fragile 10. Thyrsia. 
Lower glume muricate ; racemes panicled or race- 
mosely arranged on a long common axis ; spike- 
lets 1 -flowered 11. Jardinea. 
d. Rottbcelliastrae. 
Spikelets all alike, also as to sex ; racemes tough or 
tardily disarticulating, much compressed ; joints 
and pedicels fused 
12. Hemarthria. 
Spikelets of each pair more or less dissimilar, at least as 
to sex, the pedicelled & , neuter or suppressed. 
Sessile spikelets small, globose, foveolate, 1 -flowered, 
pedicelled very dissimilar; joints and pedicels Jj 
fused; racemes conspicuously dorsiventral ... 13. Manisuris.' 
Sessile spikelets not globose. 
Sessile spikelets much compressed, winged from 
the transversely rugose or muricate lower 
glumes, 1 -flowered, pedicelled very dissimi- 
lar; joints and pedicels fused ; racemes con- 
spicuously dorsiventral ... ... ... 14. Peltophorus. 
Sessile spikelets not winged. ~ ; ■ ■ 
Racemes usually more or less villous, very rarely 
glabrous, never cylindrical ; joints and 
pedicels moderately stout, gaping. 
Spikelets 2 -flowered, very villous all over, the 
sessile sometimes 2 at a node and sub- 
opposite ; lower glume without trans- 
parent oil-ducts or penicillate warts ... 15. Lasiurtts. 
Spikelets 1 -flowered ; racemes more or less 
villous from the joints and pedicels or the 
edges of the spikelets, rarely glabrous ; 
lower glume with a transparent oil-duct 
inside each keel or a fringe of penicillate 
warts 16. Elyonurtjs. 
Racemes glabrous, cylindrical, particularly 
when the spikelets are closed. 
Pedicels and joints fused. 
Racemes stout, few from each culm, sessile 
spikelets 2 -flowered, pedicelled 3 or 
neuter 17. Rottbcellia. *7 
Racemes slender in ample spatheate pani- 
cles ; sessile spikelets 1 -flowered ... 18. Opiiitmcrs. 
Pedicels free from the joints. 
Pedicels and joints cupular-clavate, gaping, 
exposing between them the upper 
glume (which is covered by the accum- 
bent pedicelled spikelet) ; spikelets of 
each pair similar, 2 -flowered ... ... 19. Chasmopodium. 
Pedicels and joints posticously contiguous ; 
pedicelled spikelets usually much re- 
duced or quite rudimentary. 
Racemes usually in terminal and lateral 
