402 
clvii. G ramin E iE (Stapf). \Tmchypogon. 
Awn over 3 in. long, spirals of column looser, their 
margins quite distinctly gaping ; blades wiry, 
permanently filiform, very rarely flattened out 
when old and then less than 1 lin. wide ; ligules 
very short ... ... ... ... ... . . . 4. T. durus. 
• Leaf-blades early unfolded and quite flat, up to over 2 lin. 
wide, rigidly erect from a gradually but slightly 
attenuated base ... ... ... ... ... 5. T. 'planifolius . 
1. T. Ledermannii, Pilg. in Engl. Jahrb. xlviii. 342. Annual (?). 
Culms fascicled, geniculate-ascending, up to 14 ft. high, very slender, 
branched, several-noded. Leaf -sheaths narrow, smooth, glabrous 
or with some stiff hairs upwards : ligules firm, rather long ; blades 
linear, long-tapering and very acute, about 5 in. by 1-1 \ lin., more 
or less hirsute- with tubercle-based hairs. Racemes solitary on the 
culm and its branches, at length shortly exserted from the upper- 
most sheath, 1|-2J in. long, with 9-12 pairs of spikelets, the lowest 
imperfect, barren ; internodes 1J-1J- lin. long, sparingly hairy ; 
pedicels f lin. long. Subsessile spikelets neuter. Glumes similar 
to those of the pedieelled spikelet (see below), but the lower less 
involute, rotundate-obtuse with a terminal bristle ; valves 0 or 1 , 
small and delicate. Fertile spikelets 4 lin. long including the acute 
densely and long-ful vo-setose callus. Lower glume firm, ovate 
with involute margins, upwards very shortly narrowed, truncate, 
sparingly setulose, 10-nerved, nerves rather prominent ; upper 
giume narrower, rotundate-obtuse, ciliate. Lower floret reduced to 
a very delicate rotundate-obtuse 2-nerved ciliolate valve. Upper 
floret valve thin and 3-nerved below, cartilaginous upwards, 
passing into an awn 24-3 in. long, kneed above the middle, twisted 
and white-setulose below the knee, scabrid above, at length brown. 
Upper Guinea. Cameroons : in fissures of rocks between Tukurna and 
Tapare, 4400 ft., Ledermann , 5586. 
(1 Prv-CUnrNJcAc . ^ 
2. T. Thollonii^S/.ap/. Perennial, densely caespitosa, 3-4 ft. high. 
Culms surrounded at the base by the firm persistent leaf-sheaths or 
their remains, terete, about 5-noded, glabrous apart from the densely 
and appressedly white-bearded upper ends of the internodes, the 
hairs covering the slightly constricted sheath-bases. LeaLsheaths 
firm, terete, tight, more or less produced at the mouth into short 
acute auricles, the lower longer, the middle and upper much shorter 
than the internodes, glabrous ; ligules very firm, up to 1 lin. long, 
rounded, laterally adnate to the sheath-auricles ; blades narrowly 
linear, convolute, rarely somewhat flattened out, tapering to a long 
fine point, up to 1 ft. by 1| lin., very firm and tough, glabrous or 
shortly hairy just above the ligule, smooth except on the scaberulous 
margins and the slightly rough main-nerves of the upper side, midrib 
slender or stouter downwards, not prominent below, primary lateral 
nerves few, obscure below. Racemes solitary or 2-nate, 4-2 in. 
long, secund ; rhachis subterete, glabrous except in the upper part 
