228 
clVii. gramineje (Stapf). [Andropogon. 
11. A. homogamus, Stapf. Perennial, compactly csespitose, 
with short intravaginal innovations, coated at the base with the 
glabrous ultimately fibrous sheath-bases, not much over J ft. high. 
Culms very slender, 1-noded, simple, geniculate, erect, glabrous, 
smooth. Leaf-sheaths glabrous or very sparingly hairy upwards, 
those of the innovations slightly compressed and keeled, about 
1 in. long ; ligules membranous, subtruncate, ciliolate, | lin. long ; 
blades linear, tapering to an acute point, 2-4 in. by 1-2 lin., soft, pale 
green or almost glaucous, sparingly and shortly hairy from minute 
tubercles, margins scaberulous, midrib very slender, whitish, 
prominent below, primary lateral nerves 3-4, very fine ; sub- 
tending leaf spathaceous, soon tightly convolute, 24 in. long, with 
short herbaceous blades. Peduncle filiform, 4-5 in. long, glabrous. 
Racemes 2-nate, erect, slightly curved, dense, subglabrous, 1 J— 2 in. 
long, one subsessile, the other with a very short base ; joints linear, 
slender, 14 lin. long, very shortly ciliate on both sides with the cilia 
about 4 lin. long and not developed on the inner side below the 
obliquely truncate subcupular tip ; pedicels very similar, but more 
slender and slightly longer, like the joints more or less translucent 
along the middle. Sessile spikelets homogamous with the pedi- 
celled and very similar to them except for the awns and bristles, 
broad-lanceolate, 3 lin. long, dull or olive green, glabrous ; callus 
short, obtuse, glabrous. Glumes equal ; lower chartaceous, flat 
on the back, unequally and minutely 2-toothed, keels indistinctly 
winged, intracarinal nerves about 6, very distinct, evenly distributed, 
tips subhyaline, indexed margins narrow; upper glume submem- 
branous, boat-shaped, with a fine bristle 14 lin. long from a small 
terminal notch, 3-nerved, ciliate. Lower floret reduced to an 
oblong truncate 2-nerved ciliate hyaline valve. Upper floret ^ : 
valve slightly gibbous in the middle, 2-fid to half-way, cuneate- 
oblong and firmer below, segments lanceolate-acute, sub-eciliate ; 
valvule 0. Pedicelled spikelet slightly narrower than the sessile ; 
lower glume with about 9 intracarinal nerves and a short bristle 
from between the minute teeth ; upper glume rounded or almost 
flat on the back, 3-nerved, with a terminal bristle like that of the 
lower ; lower floret as in the sessile spikelet, valve of upper obovate- 
oblong, emarginate, IJ-lf in. long, very delicate, ciliate, 1-nerved, 
the nerve often running out into a minute point ; anthers § lin. 
long ; pistil apparently perfect, with the stigmas 1 \ lin. long, 
laterally exserted. 
Nile Land. Abyssinia : Ankober, in moist places, Both, 15 ! 
A very striking grass on account of the great similarity of the homogamous 
sessile and pedicelled spikelets, but otherwise with all the characters of the 
species of the distachyus group. No anthers were seen in the sessile spikelets, 
but the long filaments present suggest that they had already been shed ; the 
stigmas of the pedicelled spikelets are very conspicuous, and it is difficult to 
assume that their ovaries would be barren, although the awns which generally 
go with fertile pistils in this group are absent. 
