54 
CLYII. GRAMINEiE (Stapf). 
[J ardineci. 
mucro, glabrous, more or less muricate at least along the sides, with 
the tubercles often bearing sharp points, keels rigidly ciliolate, 
intracarinal nerves 2-3, faint ; upper glume slightly shorter than 
the lower, subchartaceous, boat-shaped, linear in profile, acute, 
muticous, glabrous, spinulously ciliate on the keel, 3-nerved, lateral 
nerves close to the margin. Lower floret : valve linear-lanceolate, 
acute, about 2 lin. long, hyaline, ciliolate, 2-nerved and with a 
similar, only slightly shorter, valvule. Upper floret : valve and 
valvule similar to those of the lower floret. Anthers 1-1-J lin. long. 
Ovary glabrous. Styles very short. Stigmas dark purple, 1 lin. 
long, laterally exserted. Pedicelled spikelet very similar to the 
sessile, or sometimes slightly reduced, barren. — Franch. Contr. FI. 
Congo Fran9. 13. Rliytachne congoensis, Hack, in DC. Monogr. 
Phan. vi. 277 ; Durand & Schinz, Consp. FI. Afr. v. 700 ; Durand 
& Schinz, fitud. FI. Congo, i. 65, including varieties incompleta, 
Hack, polystachya, Hack., submutica, Hack., and l.c. ii. 71 ; Th. & 
Hel. Durand, Syll. FI. Congo, 623. 
Upper Guinea. Togo : Lome, Warneclce, 235 ! Southern Nigeria : Lagos ; 
Banks of Ogun river, Millen, 131 ! and without precise locality, MacGregor, 86 ! 
Northern Nigeria : Nupe, Barter, 1381 ! Abinsi, Dalziel , 898! and without precise 
locality. Barter, 281 ! 
North Central. French Congo : Likolela, between Alima and Sangha Rivers, 
forming enormous meadows, Chevalier, 5087 ! Shari Region ; Guibingui, 
between Forts Archambault and Campel, Chevalier, 10384 ! 
Nile Land. Bongo : Culango, Schweinfurth, 2215 ! 
Lower Guinea. French Gongo : Brazzaville, Thollon, 58 ! Belgian Congo : 
mouth of the Congo river, Smith ! Boma, Hens, 323 ! 
C l 
12. HEMARTHRIA, R. Br. ; Benth. et Hook. f. Gen. PL iii. 1131. 
Spikelets 2-nate on the tough or tardily disarticulating rhachis of 
spike-like spathe-supported racemes which terminate the culms and 
their often fascicled branches, alike in sex and shape, or at least 
similar ; joints and pedicels fused into roughly semicylindric inter- 
nodes, hollowed out on the inner face for the reception of the sessile 
spikelet ; disarticulation at a right angle to the rhachis or slightly 
oblique, tips of joints truncate, not hollowed out or appendaged. 
Sessile spikelet : Florets 2, lower reduced to a barren valve, upper 
$ , awnless. Glumes equal or subequal, lower flat on the back, 2- 
keeled, very narrowly inflexed along the margins, coriaceous or sub- 
coriaceous, closing up the cavity formed by the adjacent joint and 
pedicel, upper membranous adhering to the inner face of the 
cavity. Valves hyaline, of lower floret 2-nerved, of upper usually 
nerveless. Valvule (of upper floret) hyaline, small, nerveless. Lodi- 
cules 2, cuneate. Stamens 3. Stigmas laterally exserted. Grain 
oblong, dorsally slightly compressed ; embryo about two-thirds the 
length of the grain ; hilum conspicuous, punctiform, subbasal. 
Pedicelled spikelet with more elongated acuminate glumes, par- 
I l- 
ii 
I'C*' 
