406 
clvii. gr amine as (Stapf). [ Trachypogon . 
and rigidly white-ciliolate towards the tips, intracarinal nerves 5-7, 
obscure downwards except in transmitted light, with some transverse 
veins ; upper glume linear, subacute, thinner, 3-nerved, ciliate. 
Lower floret reduced to a linear-oblong truncate shortly ciliate 
faintly 2-nerved valve over 3 lin. long. Upper floret : valve linear* 
subulate with a ciliolate submucronulate tip. Fertile spikelets 
linear, 6 lin. long including the pungent very shortly and densely 
bearded callus which is li lin. long. Glumes subequal; lower con- 
volute, coriaceous, obtuse, rigidly ciliolate near the firmly scarious 
tip, more or less loosely hairy from the middle downwards, 9-nerved, 
nerves slightly raised in the tip, otherwise obscure except in trans- 
mitted light, upper very slightly longer, linear, very shortly subacute, 
ciliolate upwards. Lower floret as in the subsessile spikelet. Upper 
floret ^ : valve linear, hyaline and 3-nerved towards the base, 
cartilaginous upwards, passing into a flexuous or more or less kneed 
pale brown awn 3-3 1 in. long, column twisted with the spirals gaping, 
plumose with soft white hairs up to 1 lin. long, the bristle pale with 
gradually decreasing short hairs or merely hispidulous upwards. 
Lower Guinea. Angola : Benguella ; in moist water-logged situations along 
the meadows of the Cuito River, Gossweiler, 3199 ! 
5. T. planifolius, Stapf. Perennial, densely csespitose, 2 ft. high. 
Culms more or less coated with the remains of the basal leaf -sheaths, 
terete, 4-5-noded, glabrous except at the densely and appressedly 
white-bearded upper ends of the internodes, the hairs covering the 
slightly constricted gheath-bases. Leaf -sheaths firm, terete, those 
of the culm-leaves produced into narrow lanceolate acute auricles 
up to 3 lin. long, the middle and upper shorter than the internodes, 
glabrous or sparingly hirsute ; ligules scarious, broadly rounded at 
the top, as long as or somewhat longer than the sheath-auricles and 
laterally adnate to them ; blades linear, slightly narrowed towards 
the base, tapering to a fine point, 6-9 in. by 2-2 J lin., glaucous- 
green, quite flat, erect, rigid, glabrous, rough on the face and 
margins, less so on the back, midrib slender, prominent below, 
flat and somewhat widened downwards on the face, lateral nerves 
numerous, close, the primary hardly differentiated. Kacemes 
solitary, somewhat stiff, 4-6 in. long : rhachis slender, terete, 
sparingly hairy upwards, internodes & lin. long ; pedicels 2 lin. long, 
more or less loosely hairy. Subsessile spikelets £ or neuter, linear- 
oblong to almost linear, 3J-4 lin. long, villosulous or pubescent 
all over, variously tinged with purple. Glumes subequal ; lower 
firmly chartaceous, convex ou the back to semiterete, narrowly 
truncate, keels marginate, rigidly ciliolate upwards, intracarinal 
nerves 6-7, obscure downwards with few transverse veins ; upper 
glume slightly longer, linear, acute, ciliate. Lower floret reduced 
to a linear-oblong narrowly truncate ciliate faintly 2-nerved valve, 
3| lin. long. Upper floret : valve hyaline, linear, with a ciliolate 
