670 
CLVII. GRAMINEjE (Stapf) . 
[. Panicum . 
very minute subdiscoid tips. Spikelets elliptic, rotundate in outline,, 
often minutely apiculate, § lin. long, pale dull green or faintly tinted 
with brown, pubescent. Glumes thinly membranous, very finely 
and more or less prominently nerved, equal or subequal and almost 
as long as the lower floret, minutely apiculate, the lower 3-nerved, 
the upper 5-nerved, hairs of the latter tubercle-based. Lower 
floret (J ; valve very like the upper glume, but quite glabrous ; 
valvule slightly shorter with scaberulous keels ; anthers f lin. long. 
Upper floret broad-elliptic in outline, subacute, over J lin. by 
almost f lin. ; valve and valvule thinly papery, brownish- white, 
minutely verrucose all over ; anthers slightly smaller than in the 
floret. — Isachne nervata, Franch. Contrib. FI. Congo Fran9. 32 (in 
Bull. Soc. Hist. Nat. Autun, viii. 331). 
Lower Guinea. French Congo : plains of M’pila near Brazzaville. Thollon , 
390 ! Belgian Congo : Stanley Pool Distr. ; Dima, Vanderyst, 5106 ! Wombali, 
Vanderyst, 4482 ! 
21. P. pubiglume, Stapf in Cheval. Sudania, 17 (name). Perennial 
(according to Barter), up to 4 ft. high. Culms erect or ascending, 
much branched below, with the branches in erect fascicles, slender, 
glabrous, many-noded, lower nodes not or only shortly exserted. 
Leaf-sheaths tight, terete, quite glabrous and smooth or ciliolate 
towards the mouth, prominently striate ; ligule reduced to a narrow 
membranous ciliolate rim ; blades linear from an equally wide base, 
long-attenuated to a long subulate point, 2-4 in. by 1-1 J lin., 
suberect, rigid, flat or more or less involute, green, glabrous below, 
loosely hairy above, at least downwards, midrib very slender, lateral 
primary nerves 2-3 on each side, margins rough. Panicle erect, 
somewhat stiff, more or less exserted from the uppermost sheath, 
2J-6 in. by 1-2 in., loose, divided to the third or fourth degree ; com- 
mon axis slender, terete, smooth ; lowest internodes 1— J (rarely 1 J) in. 
long ; lowest primary branches divided from or near the base 
forming very unequal false whorls, like the following obliquely erect 
and stiff, equalling half or three-quarters the length of the panicle, 
finely filiform, smooth or here and there slightly rough ; ultimate 
divisions finely capillary, more or less wavy, usually quite smooth, 
obliquely spreading ; pedicels unequal, the lateral up to 1 lin., 
the terminal up to 2J lin. long, tips minutely discoid. Spikelets 
rotundate-obovate or suborbicular in outline, -J to almost f lin. long, 
somewhat turgid, pale green or faintly tinged with brown, more or 
less dull. Glumes thinly membranous, obliquely ovate-oblong in 
profile, subacute to obtuse, loosely pubescent, distinctly and finely 
nerved, the lower four-fifths the length of the spikelet and 3-nerved, the 
upper equalling the spikelet, and 5-nerved. Lower floret ; valve 
very like the upper glume, but glabrous ; valvule slightly shorter ; 
anthers \ lin. long. Upper floret elliptic in outline, subobtuse, 
\ lin. long ; valve and valvule thinly papery, whitish or ultimately 
