486 
CLVII. GRAMINEJE (Stapf). 
[Digitaria. 
or false whorls of 10-4, followed by 2-nate or scattered racemes on 
a slender glabrous smooth striate or subangular common axis whose 
lowest internodes are about 10, rarely up to 18 lin. apart, the 
following decreasing gradually in length to 3-2 lin. , the whole forming 
an erect rather stiff panicle 4-8 in. long and 1-2J in. wide ; racemes 
very slender, obliquely erect or spreading, rather loose, 2J-1 in. 
long ; rhachis filiform, of the longest racemes bare below for up to 
6 lin. , but frequently with minute traces of arrested spikelets, loosely 
plumose towards the base with extremely fine tubercle-based hairs, 
sub triquetrous, -jL lin. wide, angles very narrowly marginate, scaberu- 
lous, internodes 2-1 lin. long ; pedicels usually 2-nate, one very 
short and not rarely barren, the other up to slightly over J lin. long, 
filiform, angular, scaberulous, tips glabrous. Spikelets more or less 
appressed to the rhachis, oblong, acute, J-~ lin. by about J lin., 
greenish to pale straw-colour when ripe. Lower glume suppressed, 
very rarely represented by a small hyaline scale ; upper thin, oblong, 
acute, almost as long and wide as the spikelet, 3-nerved, with fine 
lines of delicate appressed blunt-tipped and thin-walled hairs between 
the nerves and along the margin. Lower floret corresponding in 
outline and size to the spikelet : valve similar to the upper glume 
but 5-nerved, nerves prominulous, fine lines of appressed or ulti- 
mately loose hairs between the lateral nerves and along the margins ; 
valvule broad, truncate, ~ lin. long, papillose ; lodicules half as long. 
Upper floret oblong, subobtuse, equalling the spikelet or very slightly 
shorter, at length brown, chartaceous, tough, margins of valve 
widely distant when mature. Anthers \ lin. long, narrowdy linear. 
Grain tightly enclosed in its floret and the closely appressed lower 
valve and upper glume, ovate-oblong in outline, subplano-convex 
to almost semicircular in cross-section, slightly over J lin. by J lin.. 
whitish ; scutellum broad-elliptic, half the length of the grain. — 
Panicum Perrottetii , Kunth, Rev. Gram. ii. 395, t. Ill ; Enurn. 
i. 96 ; Durand & Schinz, Consp. El. Afr. v. 759. P. cristatum ,- 
Anderss. in Peters, Reise Mossamb. Bot. ii. 548 ; K. Schum. in 
Engl. Pfl. Ost-Afr. C. 100. Syntherisma Perrottetii, Chase in Proc. 
Biol. Soc. Washington, xix. 191. 
Upper Guinea. Senegal: without precise locality, Heudelot, 448 ! Huardf 
Roger ! 
Lower Guinea. Angola : Benguella ; Cassuango-Cuiriri, Gossweiler, 2747 ! 
Mozambique Distr. Portuguese East Africa : Querimba Islands and main- 
land opposite them, Peters. Banks of the Zambesi, Carvalho ! Rhodesia : 
north bank of the Zambesi at Victoria Falls, Rogers , 5723 ! 
The Indian plant referred to this species (under Paspahim) in FI. Brit. Ind. 
vii. 20, is a distinct species, D. wallichiana, Stapf ( Panicum wallichianum, 
;Steud. Syn. PI. Glum. 41. P. multibrachiatum, Hochst. ex Steud. l.c. 74). 
D. Perrottetii appears to be confined to tropical Africa. 
8. D. horizontalis, Willd. Enum. Hort. Berol. 92. Annual, from 
1 to several ft. high. Culms tufted, ascending from a geniculate or 
