Ischcemum.\ clvii. gkamine^: (Stapf). 33 
Mozambique Distr. Nyasaland : Nymkowa, 6400 ft., McGlounie, 16 ! Rho- 
desia : Zambesi River, near Victoria Palls, Craster, 69 ! Kolbe, 3143 ! and 
without precise locality, Mundy ! Burtt-Davy, 5298 ! 
Very nearly allied to Ischcemum fasciculatum, Brongn., which has, however, 
much longer awns, and to Ischcemum arcuatum, Stapf, from which it differs 
in its narrower, purplish spikelets, the keels of which are not at all, or very 
narrowly winged. 
Also in the Transvaal (Lydenburg, Wilms, 1679 !) and in a slightly distinct 
form in Madagascar (Ambalavao, Perrier de la Bathie, 24 ! Ambohimitomba, 
Forsyth Major, 229 ! 745 !). The Madagascar specimens have smaller and 
glabrous or only sparingly hairy spikelets (2-2-| lin. long). 
5. I. arcuatum^ Stapf. Perennial. Culms ascending or suberect 
from a slender creeping rhizome, more or less branched and fascicled 
near the base or simple, 1-3 ft. long, rather slender, glabrous, 5- to 
many-noded. Leaf-sheaths exceeding or more or less equalling the 
internodes, subterete, glabrous, rarely hairy upwards or shortly 
bearded at the nodes ; ligules very short, truncate, ciliate ; blades 
linear-lanceolate, setaceously acuminate, 3-8 in. by 3-6 lin., flat, 
quite glabrous or hairy on the back near the base, smooth, turning 
reddish, sometimes more or less glaucous, midrib white. Racemes 
fascicled, 2-5, stout, straight or flexuous, 2-5 in. long, hairy ; joints 
stout, triquetrous, 1J-1J lin. long, slightly curved, keel (outer angle) 
ciliate with yellowish hairs ; pedicel 2 lin. long, more or less hairy 
on the back, subparallel to, but distant from the joints, pedicels and 
joints so excised at their junction as to form a pore visible from the 
back of the raceme. Sessile spikelets lanceolate-oblong, 2J-3 lin. 
long, reddish above, bearded at the base of the often stipitiform 
callus. Glumes slightly unequal ; lower lanceolate-oblong, acutely 
and shortly 2-toothed, coriaceous below, flat and more or less dis- 
tinctly 5-ribbed on the back, scaberulous, scantily hairy, keels 
winged near the tips, scabrid, intracarinal nerves 5-9 ; upper glume 
slightly longer than the lower, lanceolate, acuminate, mucronate, 
3-5-nerved, keeled upwards. Lower florets $ : valve lanceolate, 
almost as long as the subtending glume, membranous, glabrous, 3- 
nerved, with an almost equal valvule. Upper floret $ : valve 
oblong, deeply 2-fid, 2 lin. long, delicately membranous, 3-nerved, 
lobes broad, hyaline, ciliate, awn 4-5 lin. long, twisted below ; 
valvule as long as or slightly longer than the valve, acute. Anthers 
1 lin. long. Pedicelled spikelets 2j lin. long, reddish ; lower glume 
lanceolate, boat-shaped, keeled, 7-9-nerved, loosely hairy, the rest 
as in the subsessile spikelets. — I. fasciculatum var. arcuatum, Hack. 
Androp. in DC. Monogr. Phan. vi. 235 ; Durand & Schinz, Consp. 
FI. Afr. v. 697 ; Stapf in Dyer, FI. Cap. vii. 327 ; Rendle in Journ. 
Linn. Soc. xl. 224. Spodiopogon arcuatus , Nees, FI. Afr. Aiistr. 
97. Andropogon arcuatus, Steud. Syn. PI. Glum. i. 374. 
Mozambique Distr. Gazaland: Lusitu River, 3000 ft., Swynnerton, 1652 ! 
Also in South Africa from Natal to the Kei River. 
FL. TROP. AFR. VOL. IX. 
D 
