221 
Andropogon.] clvii. gramine^e (Stapf). 
these Chiovenda adds a var. pseudoabyssinicus. They differ in the presence 
or absence of hairs on the back of the first glume of the s pikelets. These forms 
evidently grow together and represent merely individual fluctuations. 
^ 5. A. pilosellus, Stapf. Perennial, densely tufted, with numerous 
innovations from a short oblique rhizome, 1J ft. high. Culms 
geniculate or straight, erect, very slender, 2-3-noded, simple, some- 
what compressed below and grooved on one side, glabrous, smooth, 
internodes (at least the intermediate and upper) exserted. Leaf- 
sheaths tight, the lowest more or less compressed and very narrow, 
1- 1J in. long, with their glabrous bases persistent, smooth, more 
or less finely hirsute upwards and bearded at the mouth ; ligules 
delicately membranous, ciliolate and sparingly long-hairy from the 
back, J-f lin. long ; blades narrow-linear, slightly attenuated at 
the base, long-taperingHo a fine point, 4-6 in. by f-lj lin., slightly 
rigid, flat, subglaucous, shortly and finely hirsute on both sides but 
particularly below, pruinose above, scabrid along the margins almost 
from the base, midrib very slender throughout, whitish, primary 
lateral nerves 2-3 on each side, very fine ; subtending leaves spatha- 
ceous, soon convolute and very narrow, 3-3J in. long, excluding the 
more or less rudimentary herbaceous blade. Peduncles filiform, 
very slender, long-exserted, hairy towards the tips. Racemes 
2- nate, one sessile, the other with a short hairy base, 1J to over 
2 in. long, slender, dense, villous, greyish, subflexuous ; joints linear, 
slightly wider upwards, If lin. long, subtrans parent between the 
thickened edges, densely and long ciliate on both sides (cilia up to 
over If lin. long), glabrous on the back, at least along the middle, 
but often hidden by the callus hairs and cilia lying across it ; tips 
obscurely cupular, truncate ; pedicels similar, but more slender and 
transparent and less copiously ciliate, up to If lin. long. Sessile 
spikelets heterogamous (except the lowest of the sessile raceme which 
is awnless and imperfect), lanceolate-oblong, 3| lin. long ; callus 
short, obtuse, with a dense beard somewhat exceeding it. Glumes 
subequal ; lower subchartaceous, long-hirsute from the flat back, 
unequally 2-dentate, the longer tooth produced into a very fine 
mucro, unequally winged from the keels, one wing very narrow, intra- 
carinal nerves very fine and close, about 9 ; upper glume membranous, 
narrowly boat -shaped, loosely hairy on the back, aristulate from the 
minutely notched tips, 3-nerved, ciliate. Lower floret produced to an 
oblong truncate 2-nerved ciliate hyaline valve, up to 2 b lin. long. 
Upper floret ^ : valve 2 \ lin . long, 2-fid to below the middle, cuneate- 
oblong and subchartaceous below the linear-lanceolate acute ciliate 
lobes, gibbous on the back, awn slender, 7-8 lin. long, bent at and 
twisted below the middle ; valvule 0. Pedicelled spikelet neuter, 
reduced to the glumes, up to 2 1 lin. long ; lower glume lanceolate- 
oblong, more or less involute, minutely 2-toothed and shortly aristu- 
late, keels very narrowly winged, hirsute, intracarinal nerves about 2, 
