72 
CLV1I. GRAMmE^E (Stapf). 
[Elyonurus. 
slender, np to 3 ft. high, 2-noded, glabrous ; internodes exserted. 
Leaf -sheaths short, more or less hairy ; ligules very short ; blades 
narrow-linear, acute, folded, about 5 in. long, or those of the culms 
much shorter, hairy. Racemes solitary, on a long-exserted peduncle, 
3 -4 in. long ; joints varying in length, those near the base of the 
raceme up to 6 lin. long, the upper somewhat shorter, stout, convex 
and striate on the back, flat on the face, with the margins thickened, 
disarticulating obliquely, with the scar surrounded by an irregular 
denticulate membrane, with a long and dense white beard at the 
base of the sessile spikelet ; pedicels similar to the joints, but flatter, 
with the tips not oblique. Sessile spikelet ovate-lanceolate, 4 lin. 
long. Glumes equal ? ; lower rigid, scabrid, hairy at the apex, 
keels with warts bearing short stiff hairs, intracarinal nerves 4, 
raised on the back, with shorter ones in between ; upper glume 
boat-shaped, with a stout middle nerve and 2 faint lateral nerves. 
Lower floret equalling the upper glume : valve ovate, ciliate, 3- 
nerved, with a valvule. Upper floret ovate-oblong, very delicate, 
3-nerved. Grain ellipsoid, scutellum reaching almost to the middle, 
hilum small, roundish. Pedicelled spikelet similar to the sessile, 
less verrucose, 
Upper Guinea. Cameroons : between Garua and Mao Madi, in the savan- 
nahs, 1200 ft., Ledermann, 3605. 
Evidently near to E. hirtifolius, Hack. 
17. ROTTBCELLIA, Linn. f. ; Benth. et Hook. f. Gen. PI. iii. 
1129, partly. 
Spikelets 2-nate on the nodes of the very fragile rhachis of stout 
cylindric perfectly glabrous spike-like racemes which terminate the 
culms and their branches (in the latter case spathe-supported), 
different in sex and usually also in size, colour and nervation except 
those of the uppermost pairs which are barren, homceomorphous and 
upwards increasingly reduced forming a tail-like tapering appendage 
to the raceme ; joints dorsally flattened below, widely cup-shaped 
and hollowed out upwards, more or less completely fused, although 
externally marked off, with the equally flattened and upwards very 
slightly thickened pedicels along their posticous angles, forming a 
deeply concave rather thin-walled receptacle for the reception of 
the sessile spikelet ; disarticulation of the joints at a right angle or 
oblique to the rhachis, of the pedicelled spikelets slightly oblique, 
leaving a crescent-shaped, faintly concave scar. Sessile spikelet 
pale, triangular in cross section, the narrow callus fused with the 
bases of the adjacent joint and pedicel into a glabrous ring from the 
centre of which protrudes a knob fitting into the cup-shaped hollow 
of the next lower joint, the whole plexus falling together. Florets 2, 
lower (L upper $ , awnless. Glumes equal ; lower coriaceous, flat 
on the back, with very narrow inflexed margins, 2-keeled upwards, 
