218 
CL VII. GRAMINEiE (Stapf). 
[Andropogon. 
chartaceous, obscurely and unequally 2-denticulate, with a short 
terminal bristle ; keels indistinctly winged, intracarinal nerves 2 on 
each side very close to the keels, and one middle nerve ; upper glume 
very acute, mucronate, sub-3-nerved, ciliate ; valve of lower floret 
oblong, 2-nerved, ciliate ; upper floret reduced to a perfect or 
f imperfect $ flower. — A. amethystinus, var. Lima , Hack, in DC. 
Monogr. Phan. vi. 464- ; Durand & Schinz, Consp. FI. Afr. v. 705. 
A. brachyatherus, Hook. f. in Journ. Linn. Soc. Bot. vii. 231. 
Upper Guinea. Cameroons : Cameroon Peak, 8000 ft., Mann , 2084 ! 
The affinity of this species with the preceding is so evident that it must be 
placed here in spite of the presence of a nerveless median groove in the lower 
glume of the sessile spikelet, a character which would seem to point rather to 
the section Leptopogon. 
3. A. distachyus, Linn. Sp. PL ed. i. 1046. Perennial, csespitose, 
1-2J ft. high, with a short oblique rhizome and extravaginal innova- 
tions ; their cataphylls hairy to villous at the base. Culms erect, 
slender, terete, about 3-noded, simple or branched below, glabrous, 
internodes exserted. Leaf-sheaths terete, tight, glabrous or, particu- 
larly the lowest, hairy ; ligules hairy, truncate, very short, up to 
1 lin. long, ciliolate ; blades linear, tapering to a long and sometimes 
setaceous point, 2 to over 8 in. by f-2, rarely 2-J, lin.,. flat, rigid to 
flaccid, more or less hairy, at length often glabrescent, or glabrous 
from the beginning, more or less rough above and scabrid on the 
margins, midrib fine, whitish ; primary lateral nerves 3-4 on each 
side, fine ; subtending leaves often spathaceous, subherbaceous to 
herbaceous, soon tightly convolute, 3-5 in. long excluding the seta- 
ceous to foliaceous short blade. Peduncles filiform, glabrous, 5-9 in. 
long, tips articulate, shortly bearded, truncate. Racemes 2-nate 
(exceptionally 3-5-nate), one sessile, the other with a short base, 
rather robust, straight or curved, greenish, often tinged with a dull 
or livid purple, 2-4 in. long ; joints cuneate-linear, hollow and very 
slightly inflated, rarely slender, up to 1J-2 lin. long, semitransparent 
along the middle, glabrous to subpubescent on the back, ciliate 
along the outer margin, cilia \ to almost 1 lin. long ; tips slightly 
cupular ; pedicels similar, slightly longer and more translucent. 
Sessile spikelets all heterogamous (or the lowest of the sessile raceme 
usually imperfect), broad-lanceolate to acuminate, 4J-5J lin. long, 
pale green, tips often purplish ; callus short, obtuse, shortly bearded. 
Glumes unequal ; lower subherbaceous or chartaceous or hyaline 
in the slender acumen, flat on the back, glabrous or puberulous, 
rarely villous ; keels running out into mucros or fine bristles, dis- 
tinctly winged, wings thin, whitish or purplish ; intracarinal nerves 
7-11, partly evanescent below, evenly distributed ; upper glume 
distinctly shorter, rigidly membranous, boat-shaped, 3-nerved, 
softly ciliate, tips minutely 2-toothed, with an interposed bristle up 
to 3 lin. long. Lower floret reduced to an oblong subacute or acute 
