248 
clvii. GRAMJNEiE (Stapf). [Andropogon. 
30. A. Dummeri, Stapf. Perennial, densely tufted, 1 J-3 ft. high, 
with numerous innovations, coated at the base with long-persistent 
fibrous sheaths. Culms erect, very slender, simple, 2-3-noded, 
glabrous, smooth, internodes often long-exserted. Leaf-sheaths 
terete, tight, glabrous, the lowest short, persistent and usually break- 
ing up into fibres ; ligules short, rounded, membranous, J-f lin. 
long ; blades linear, somewhat attenuated towards the base, long- 
tapering to a fine point, up to over 6 in. by 1-2 lin., somewhat soft 
or at least flexuous, at length turning brown, scattered with fine 
white long more or less spreading hairs above in the lower part, 
otherwise glabrous, margins more or less spinulously scabrid, 
midrib slender, prominent below, lateral nerves 3-5 on each side, 
very fine ; subtending leaf with a very narrow soon convolute 
sheath, and usually a filiform or setaceous blade. Peduncle filiform, 
slender, at length usually long-exserted, tips imperfectly articulated, 
usually minutely bearded. Racemes 2-nate, one sessile or subsessile, 
the other with a short base, slightly flexuous or straight, 1J-3 in. 
long, slender, rather dense, olive-green, tinged with purple or brown ; 
joints cuneate down to the middle, then linear, 2 lin. long, mostly 
shortly and loosely ciliate on the outer side all along, on the inner 
side up to the middle, outer and uppermost cilia rarely over 1 lin. 
long, tips obliquely and shallowly cupular and crenulate. Sessile 
spikelets heterogamous (except the lowest of the sessile racemes — 
rarely of both racemes — which is imperfect and awnless), laterally 
much compressed, tightly wedged in between joint and pedicel, 
linear-lanceolate in front view, 2J-2§ lin. long including the callus 
which is subobtuse, over 2 lin. long, and scantily bearded from the very 
base. Glumes equal, chartaceous, glabrous, the lower acuminate, 
2-denticulate, deeply grooved between the very narrow and upwards 
acute and scaberulous keels, nerveless between the keels, the upper 
boat-shaped, subacute, 1-nerved, or with very obscure marginal 
nerves, ciliate. Lower floret reduced to an oblong subobtuse 2- 
nerved ciliolate subhyaline valve. Upper floret $ ; narrow linear- 
oblong, shortly 2-fid, 1 J lin. long, ciliolate, 3-nerved below ; awn 
fine, J-l in. long, bent at and twisted about the middle, more or less 
flexuous ; valvule lanceolate-oblong, acute, over 1 lin. long, awnless. 
Anthers up to 1 J lin. long. Pedicelled spikelets $ , broadly lanceo- 
late to lanceolate-oblong, acute or acuminate, 2|-3J lin. long, up 
to 1 lin. wide, usually convex or almost flat on the back, glabrous, 
often dark and dull purplish ; lower glume subherbaceous with 
numerous close nerves of which the central and the outer are per- 
eurrent, keels scabrid above ; upper membranous, acuminate, 
finely 3-nerved, ciliate ; valves of both florets hyaline, oblong, 
slightly shorter than the glumes, of the lower 2-nerved, ciliolate, 
of the upper 1-nerve 1, eciliolate ; valvule linear, 1 lin. long. 
Nile Land. Uganda : Mabira Forest ; ( near Kiwala, in low grass land 
4000 ft.,) Dummer, 2979! Kibanga/ by the lake, 3780 ft., Dummer, 1405! 
