510 
CLVII. GRAMINE^J (Stapf). 
[ Brachiaria . 
Spikelets ovate to oblong-elliptic, more or less pu- 
bescent, particularly upwards, rarely glabrous, 
greenish, contiguous to subimbricate ... 32. B. xantholeuca. 
Spikelets obtuse to subacute or minutely apiculatc. 
Spikelets 14-2|lin. long, mostly loosely to very loosely 
arranged (or more or less approximate in 33. 
B. ramosa), if paired the primary always borne on a 
distinctly elongated pedicel. 
Spikelets 1| lin. long, pubescent or glabrous. 
Spikelets or pairs or clusters (secondary racemes) 
of spikelets approximate, evenly distant by 
less than their own length or rather remote 
downwards, glabrous or hairy ; primary 
pedicels up to 1 lin. long 33. B. ramosa. 5~ 2— 
Spikelets or pairs of spikelets or secondary 
racemes very loosely scattered, distant by 5-8 
lin., glabrous or hairy ; primary pedicels 
3-5 or even 10 lin. long 34. B. mjidqris. 
Spikelets 1£— 24 lin. long, quite glabrous. 
Racemes early defiexed ; blades finely pubescent 
all over, their margins scaberulous 35. B. ovulis. 
Racemes suberect or obliquely spreading ; blades 
glabrous or with a few scattered marginal 
hairs near the. base. 
Blades more or less rounded at the base, their 
margins scaberulous; spikelets or pairs 
of spikelets very loosely scattered, 4-10 
lin. distant 30. B. grossa. 
Blades cordate or obtusely auriclcd at the base, 
their margins markedly cartilaginous and 
spinulously serrulate ; spikelets or pairs 
of spikelets more approximate, distant by 
2-3 lin. ... 37. R. serrifolia. 
Spikelets 1|-1A lin. long. 
Spikelets pubescent, obovate -oblong, apiculate, 
densely 1- to sub-2-seriate, all subsessile ; all 
parts of the plant very pubescent 38. B. pubifolia . 
Spikelets glabrous, oblong, obtuse to acute. 
Valvule of lower floret with distinct indexed flaps, 
epapillose ; fruiting floret very finely trans- 
versely rugose or almost smooth ; racemes 
suberect or oblique, loose to very loose ; 
blades delicately pubescent to almost villous 39. B. glauca. 
Valvule almost without flaps, papillose at the 
base ; fruiting floret sharply transversely 
rugose ; racemes usually more or less indexed 
after flowering, rather dark or loose to very 
loose ; blades glabrous or with a few tubercle - 
based hairs here and there 40. B. Icersioides. 
VI. Distjchophyllje. 
Lower glume reduced to a minute nerveless hyaline scale. 
Racemes simple, sessile, secund or subsecund on a 
common axis 41. B. Isachne . 
Racemes simple or compound, gathered in an open panicle 42. B. poceoides. 
