226 
CL VII. GRAMINEiE (Stapf). 
[Andropogon. 
9. A. Mannii, Hook.f. inJourn. Linn. Soc. Bot. vii. 232. Perennial, 
densely tufted, with numerous intravaginal innovation shoots, § to 
over 1 ft. high. Culms slender, erect or subgeniculate, strongly com- 
pressed, 1-noded, simple, appressedly hairy below the racemes, other- 
wise glabrous. Leaf -sheaths glabrous, smooth, those of the innova- 
tions and base of the culm strongly compressed and keeled, 1J-2J in. 
long, the only cauline sheath about 2J in. long, somewhat loose ; 
ligules very short, membranous, truncate, ciliolate ; blades linear 
from a very shortly and slightly narrowed base, acute, the basal 
up to 3 in., the cauline up to 1 in. long, 1 to almost 2 lin. wide, green, 
folded or flat, glabrous with the exception of a few fine spreading 
hairs at the base, margin scaberulous, midrib fine, primary lateral 
nerves about 3 on each side. Peduncle 3-9 in. long, long-exserted. 
Racemes usually 3, rarely 2 or 4, digitate or subdigitate with short 
more or less hairy bases or the lateral subsessile, dull greenish, tinged 
with violet, 1 J to nearly 2 in. long, erect ; joints and pedicels filiform, 
not or very obscurely thickened upwards, up to 14 lin. long, shortly 
ciliate on both sides, cilia about 4 lin. long, tips truncate, not or 
very obscurely cupular. Sessile spikelets all heterogamous, narrowly 
lanceolate, 3 lin. long, acuminate, olive-green, more or less tinged with 
purple ; callus very short, obtuse, shortly bearded. Glumes equal, 
subchartaceous to membranous, glabrous ; lower minutely 2-dentate, 
slightly concave on the back at least below the middle, very smooth 
and glossy, with 2 closely approximate nerves in each keel, keels acute 
and scaberulous upwards ; upper glume narrowly boat-shaped, 
aristulate from the minute notch, 3-nerved, lateral nerves very faint. 
Lower floret reduced to a linear-oblong obtuse hyaline 2-nerved 
obscurely ciliolate valve over 2 lin. long. Upper floret ^ : valve 
sublinear, under 2 lin. long, 2-fid to the middle with the lobes subulate 
and obscurely ciliolate, awn fine, up to in. long, kneed at and twisted 
below the middle ; valvule a minute truncate scale. Anthers over 
1 lin. long. Pedicelled spikelets $ , lanceolate, aouminate, to over 
3 lin. long, green or livid purple, glabrous ; lower glume sub- 
membranous, vrith a more or less prominent median nerve and 2 or 3 
slender nerves close to the keel ; upper glume membranous, 3-nerved, 
mucronulate ; lower floret reduced to a hyaline oblong nerveless 
obscurely ciliolate valve; upper floret reduced to the $ flower; 
anthers up to 14 lin. long. — Hack, in DC. Monogr. Phan. vi. 460 ; 
Durand & Schinz, Consp. FI. Afr. v. 717. Gymnandropogon sp., 
Hook. f. in Journ. Linn. Soc. Bot. vi. 23. 
Upper Guinea. Fernando Po : Clarence Peak, 8500-9000 ft., Mann, 654 ! 1475 ! 
The anthers of some of the pedicelled spikelets appear to be atrophied. 
10. A. humilis, Hochst . ex A. Rich. Tent. FI. Abyss, ii. 453. 
Annual, 6-8 in. high. Culms very slender, geniculate, erect, about 
3-noded, with simple flowering branches from all the nodes, glabrous, 
