400 
CLVII. GRAMINE^E (Stapf). 
[Monium. 
1. M. macrochsetum, Staff. Annual, up to over 1 ft. high. Culms 
very slender, erect, simple, 2-4-noded below the panicle, often 
rooting from the first node above the ground, terete, glabrous, smooth. 
Leaf-sheaths terete, tight, glabrous, thin, the lowest withering away ; 
lignles very short, rounded or truncate, ciliolate ; blades finely 
linear from an equally' broad base, tapering to a fine point, 1-2 in. 
by J-J lin., folded at first, then flat, glabrous or very finely pubescent, 
slightly rough on the upper side and the margins, midrib and primary 
lateral nerves very slender, somewhat prominent. Spatheate 
panicle contracted, very narrow, up to J ft. long ; primary internodes 
up to 4, lowest up to 3 in. long, but mostly much shorter, the follow- 
ing gradually decreasing ; primary branches forming up to 4-rayed 
tiers, or the lowest undivided at the base, several-noded, and often 
very long (10 in.) ; tiers with 1 compound ray or all the rays simple, 
very slender, angular, slightly rough upwards ; lower subtending 
Leaves quite like the preceding ones. Spatheoles very narrow 
and very early tightly inrolled, long and finely acuminate, f-1 in. 
long, scarious, pale or pinkish, glabrous ; peduncle enclosed in the 
spatheole, very finely filiform, scaberulous, with slightly thickened 
very obliquely truncate tips. Spikelets about 3 lin. long, chestnut- 
brown, glabrous except for the callus which is £ lin. long and rufously 
bearded. Glumes minutely pubescent, scaberulous upwards, soon 
becom ing glabrescent and glossy below ; lower obscure, 6-7-nerved, 
upper with a delicate bristle up to over 1 lin, long. Lower floret : 
valve obscurely ciliolate, 1-lJ lin. long. Upper floret : valve 
1J-1J lin. long, eciliolate, 2-fid to one-quarter, lobes subulate, awn 
1 slender, lf-2 in. long, bent at almost a right angle above the middle, 
column very straight, loosely twisted, glabrous, dark-brown ; bristle 
paler, somewhat rough. Anthers over 1 lin. long. Grain 1 lin. 
long. 
Upper Guinea. French Guinea : near Timbo, on inundated land, Pobegitin , 
1790 ! 
48. TRACHYP OGrON, Nees; Benth. et Hook. f. Gen. PL iii. 1133. 
Spikelets 2-nate, those of each pair differing in sex and slightly in 
shape, both pedicelled on the tough or upwards very tardily dis- 
articulating many- jointed rhachis of solitary, 2-nate or digitate 
racemes, terminating the culms ; pedicels unequal (the lower very 
short), fused towards the base with each other and the adjacent 
internode of the rhachis, this and the pedicels terete or subterete, 
the longer of the latter disarticulating very obliquely ; internodes 
marked off by very oblique and usually shortly bearded articulation 
lines ; subsessile spikelets persistent ; long-pedicelled spilmlets 
falling separately. Florets 2, lower reduced to an empty valve, 
upper or neuter in the subsessile, ^ in the upper long-pedicelled 
