138 MR. H. N. RIDLEY ON THE WEST-AFRICAN 
C. LÆTUS, Presl, Rel. Henk. i. p. 170. C. oostachyus, Nees, Сур. Bras. р. 39. 
Huilla, in uliginosis sylvaticis nunc fere exsiccatis prope Eme, versus lacum Ivantala, 
initio Maii 1860, no. 6860. 
This species occurs in South America, especially in South Brazil and Chili, and a variety 
of it in Texas. The Angolan plant differs from the typical form in being more glaucous, 
and in its rigid leaves with revolute margins; the glumes are rufescent, the roots and 
vaginee of the lower leaves red. 
C. LATIFOLIUS, Poir. Encycl. vii. p. 268. 
Cazengo, ad lacum de Moembege, socialis cum Cypero papyro, et Filicibus, at non 
frequens, Jun. 1855, no. 7068. 
Occurs also in the Mascarene Islands, Mozambique, and South Africa. 
C. DISTANS, Linn. f. Suppl. p. 103. 
Prince's Island, in arenosis ad littus oceani, prope Port de S. Antonio, Sept. 1853, 
no. 7033 b. 
Loanda, ad Кергеза de Quicuxe, no. 7054; Represa de Luiz Gomes, post Alto das 
Cruzes, Dec. & Febr. 1853-54, no. 7048 ; in palustribus ad Represas pequefias do Signor 
Ricardo, no. 7047. 
Pungo Andongo, in pratis paludosis prope Lombe, in ditione Condo, Mart. 1857, 
no. 6935. 
Ambaea, ad lacum Canguele-Canganga, Jan. 1855, по. 7095. 
Huilla, in arvis humidis inter Sorghi satus, prope Monino, Feb. 1860; flores juniores, 
no. 6880. 
Widely distributed throughout the tropics. 
C. toneus, L. Sp. Pl. p. 45. 
In humidis ad oras plantationum Sacchari frequens, Julio 1859, no. 6886. 
Distributed all over Africa, as well as Europe, Asia Minor, India, and Malaya. 
C. RorUNDUS, L., var. ELONGATUS, Boeckeler. 
Loanda, ad lacum de Quicuxe, Aprili 1854; in paludosis ad flumen Bengo prope San 
Antonio, frequens, no. 7023, Dec. 1855. 
Golungo Alto, frequens circa nigritarum pagos et juxta vias, Sange, April. 1855, no. 
7102. 
“ This species and another besides with yellowish spikelets without tubers * form twice 
a year (after the rainy seasons) green grass-plots. 1% infests the fields, and where it 
once appears is almost impossible to eradicate.” 
A common tropical weed. - 
С. ESCULENTUS, L. Sp. Pl. p. 45. 
Pungo Andongo, prope Præsidium et Sansamanda, no. 6907. 
Golungo Alto, in glareosis ad pedem Montis Cungulungulo, at sparsim, ad finem Jan. 
* Probably C. esculentus, L., is alluded to. 
