128 MR. H. N. RIDLEY ON THE WEST-AFRICAN 
pedali striato triquetro; foliis linearibus rigidis complanatis carinatis scabris glaucis, 
culmo dimidio brevioribus, patentibus, vaginis truncatis; capitulo singulo, phyllis 
involucralibus 4 linearibus glaucis patentibus uno 4-unciali; spiculis multifloris 
linearibus, 5-linealibus; rhacheola recta, foveolis brevibus oblongis ; squamis lanceo- 
latis, brevissime mucronatis albis, dorso pallide sanguineo-punctato ; stylo bifido 
parum exserto gracili ; caryopsi ovata lenticulari fusca, transversim rugosa, mucrone 
longiusculo. 
Pungo Andongo, rarius, ad ripas fluminis Cuanza prope Candumba, in ipsius fluminis 
agris, socialis cum Arundinibus, Pandanis et Filicibus, no. 6897, Jun. 1857. 
This seems most nearly related to C. polystachyus, L., of which it has very much the 
habit. 
С. ($ Рүсветв) Lavieatts, L., Mant. 179. 
St. Vincent’s Island, Cape Verd, Monte Verde, at an elevation of about 1000 feet 
by half dried-up streams, at the end of August, no. 7075. 
Mossamedes, in paludosis prope Aguadas prope Mossamedes, no. 6858; in subsalsis 
prope os Cazados, no. 6857; prope Cavalheiros, in arenosis ad flumen Bero, no. 6856; in 
arenosis ad ripas ad flumen Caroca, Cabo Negro, no. 6855. 
A cosmopolitan plant widely distributed over Africa. 
All the specimens belong to the white-glumed variety, except a specimen under the 
number 6858, which has fuscous glumes ; no. 6855 is a very small form, 1-2 inches high, 
with single spikelets. 
С. ($ Pycrevs) PUsTULATUS, Vahl, Enum. ii. p. 341. 
Pungo Andongo, ad paludes parum profundas inter Presidium et Quilanga, Febr. 
1857; ad ripas Casalale, no. 6918. 
In graminosis prope domum Rodrigo, rarus, Febr. 1855, no. 7090 (ac no. 7156, loc. ?). 
Occurs also in Upper Guinea, Senegal, and Nupe. 
C. ($ PxcREUS) CUANZENSIS, n. sp.; rhizomate breviter repente radicibus crebris crassius- 
culis; culmis flaccidis compressis striatis bipedalibus ; foliis culmis subzequantibus 
flaccidis linearibus viridibus marginibus scabris, vaginis membranaceis integris 
striatis ; capitulo uno rarius altero; involucralibus duobus, quorum uno longissimo 
sexunciali, viridibus flaccidis linearibus marginibus scabridis suberectis ; spiculis, plus 
quam viginti, multifloris compressis late lanceolatis albidis; squamis lanceolatis 
irinerviis, marginibus crispis, carina viridescenti, lateribus albis; rhacheola recta 
quadrilatera, foveolis brevibus oblongis; stylo profunde bifido parum exserto; 
caryopsi obovata globulosa basi angustata parva nigra. 
Pungo Andongo, in pratis paludosis ad flumen Cuanza, prope Huilla, Mart. 1857, 
no. 6899. 
The affinity of this plant appears to be with С. bromoides. 
