52 
CLVII. GRAMINEiE (Stapf). 
[J ardinea. 
or almost smooth on the green nerves and the angles, disarticu- 
lating horizontally, scar glabrous or sparingly ciliolate ; pedicels 
linear, terete, much compressed, about as long as the joints or slightly 
shorter, more or less contiguous with them or slightly gaping near 
the base, ciliolate on the inner angle. Sessile spikelet linear- 
lanceolate, with a narrow annuliform very shortly bearded callus, 
3-4 lin. long. Lower glume acute or subacutely acuminate, often 
running out into a rigid sharp mucro, glabrous, muricate-tuber- 
culate along the sides or more or less across the base of the flat back, 
with the tubercles often bearing sharp points, keels rigidly ciliolate 
above, intracarinal nerves 3, fairly distinct on the inner face ; upper 
glume slightly shorter than the lower, chartaceous, boat-shaped, 
linear in profile, subacute, muticous, glabrous, spinulously ciliolate 
on the keel, 5-nerved, lateral nerves in pairs close to the minutely 
ciliolate margin. Lower floret : valve linear-lanceolate, acute, 2|— 3 
lin. long, hyaline, ciliate, 2-3-nerved, with or without a short 
valvule. Upper floret : valve similar to that of the lower, with a 
slightly shorter very narrow 2 -nerved ciliolate valvule. Anthers 
1J lin. long. Ovary pubescent at the top. Styles J lin. long from 
much thickened bases. Stigmas purple, laterally exserted, up to 
£ lin. long. Pedicelled spikelet reduced to a lanceolate or subulate 
glume up to lin. long or almost entirely suppressed. — Franch. 
Contr. FI. Congo Frang. 12, partly. Rhytachne gahonensis , Hack, in 
DC. Monogr. Phan. vi. 276 ; Durand & Schinz, fitud. FI. Congo, 
313 ; Consp. FI. Afr. v. 700 ; De Wild, fitud. FI. Bas- et Moyen- 
Congo, i. (1903) 11 ; ii. (1907) 10 ; Th. & Hel. Durand, Syll. FI. 
Congo, 623. 
Lower Guinea. French Gaboon : Gaboon River, Mann, 1028 ! Spanish 
Gaboon : Corisco Bay, Mann, 1891 ! French Congo : Brazzaville, Thollon, 
893 ! Belgian Congo : Tombi-Lutete, Hens , 310 ! Kisantu, Gillet, 3508 ; 
Lemfu, Gillet, 
2. J. angolensis^$to$/ > . Perennial, from a stout creeping rhizome 
with intravaginal. innovations, covered at the base with short hard 
glabrous cataphylls. Culms up to 4 ft. high, stout, 6-7-noded, with 
all the internodes (except the uppermost) enclosed in the sheaths, 
terete, glabrous and smooth. Leaf-sheaths tight, terete, quite 
glabrous and smooth, the basal more or less persistent, firm ; ligules 
short, membranous, ciliolate ; blades tapering rapidly, narrowly 
linear below, setaceous above, up to over 1 ft. long and 1J-2 lin. 
wide near the base, very firm, flexuous in the upper part, midrib 
stout and channelled above, keeled on the back in the lower part, 
glabrous excepting a silky beard at the junction with the sheath, 
scabrid on the margins and scaberulous towards the tips, primary 
lateral nerves few. Racemes usually 5-9 on a common rhachis, the 
lowest solitary and long peduncled, the following paired, shortly 
peduncled or more usually sessile, fragile, rigid or slightly flexuous, 8 
to almost 12 in. long, straw-coloured or dull brownish-purple; common 
2256. . „ ^ 
