232 
clvit. gramineje (Stapf). [Andropogon . 
S 15. A. calvescens, Stapf. Perennial. Culms (upper part only 
known) up to 10 ft. high, erect, stout, terete, glabrous, pruinose 
below the nodes. Leaf -sheaths firm, terete, tight, quite glabrous 
and smooth, the lower up to 1 in . wide when flattened out ; ligules 
narrow, ciliolate ; blades linear, long-tapering to a fine point, flat or 
involute, over lb ft. long, up to 2 lin. wide at the middle, widened 
towards the base, very firm and hard, glabrous, spinulously ciliolate 
along the revolute margins, slightly rough above, smooth below, 
midrib flat and obscure, lateral nerves fine and numerous. In- 
florescence a very long narrow interrupted spatheate panicle of 
numerous mixed or upwards simple 4-5-rayed distant tiers ; lower 
and intermediate spathes resembling the preceding leaves ; even the 
uppermost with a subulate upwards spinulously ciliate rigid blade, 
glabrous ; rays filiform, erect, strict throughout or more or less 
arching upwards, if compound the lower internode about 3 in. 
long. Spatheoles narrow, tapering to a long fine point or a short 
subulate blade, up to 3 in. long, at length tightly inrolled, pale brown ; 
peduncles at length more or less (usually shortly) exserted. Racemes 
about 5-6, subdigitate, very slender, 1J to 1| in. long, very lax, 
loosely plumose, flexuous and often nodding, with a scaberulous 
base (up to 2| lin. long) or sessile ; joints finely filiform, lb to almost 
2 lin. long, loosely ciliate, hairs up to lb lin. long : pedicels similar, 
but finer and shorter. Sessile spikelet linear -lanceolate, 2-J lin. long, 
purplish, glabrous ; callus minute. Glumes membranous, the lower 
2-mucronulate, nerveless and slightly sunk between the scaberulous 
keels, the upper acute, 1-3-nerved, ciliolate. Lower floret reduced 
to a linear-oblong acute valve, 1J lin. long, hyaline, ciliolate. Upper 
floret § : valve narrow linear -lanceolate, shortly 2-fid, over H lin. 
long and ciliolate ; awn a fine flexuous bristle, about 4 lin. long ; 
valvule ovate, acute, b hn. long. Anthers and grains unknown. 
Pedicelled spikelet neuter, narrowly lanceolate, about 2 lin. long, 
acutely acuminate, dark purplish ; lower glume 3-nerved ; upper 
slightly shorter and 1 -nerved ; both florets reduced to hyaline 
ciliolate valves, the upper much narrower. 
Upper Guinea. French Guinea : Bailing valley, in marshy ground, Pobe- 
guin, 1802 ! 
16. A. tenuiberbis, Hack, in DC. Monogr. Phan. vi. 435. 
Perennial. Culms (base not known) 15 ft. high, stout, terete, 
smooth and glabrous upwards, from the upper nodes. Leaf -sheaths 
terete, tight, glabrous, smooth, produced at the mouth into erect 
oblong to lanceolate auricles ; ligules reduced to a ciliolate rim ; 
blades linear from the base, tapering to an acute point over 1 ft. 
long, 2-2 J lin. wide, rigid and firm, bearded or ciliate towards the 
ligules, otherwise glabrous, margins spinulose, ciliate, spinules very 
sharp and firm towards the tips, midrib slender, keeled below, lateral 
