Ceratophyllum.'] cxxvii. ceratophylle;e (Skan). 327 



sometimes up to 8 ft. long. Leaves in whorls of 5-12, 1-3 times 

 usually twice dichotomously divided, often about 1 in. long; seg- 

 ments linear to filiform, entire or more or less remotely spinulose- 

 serrulate. Perianth-segments oblong, about J lin. long. Fruit 

 ovoid or ellipsoid, slightly compressed, about 3 lin. long, smooth 

 or sparingly covered with minute tubercles, narrowly or broadly 

 winged or wingless, crowned with the long slender often curved 

 persistent style and usually bearing 2 recurved subulate or terete 

 spines at the base. — Smith & Sowerby, Engl. Bot. xiv. t. 947 ; DC. 

 Prodr. iii. 73 ; Guill. & Perr. Fl. Seneg. Tent. 296 ; Boiss. Fl. Orient, 

 iv. 1202 ; Hook. f. Fl. Brit. Ind. v. 639 ; K. Schum. in Mart. Fl. 

 Bras. iii. iii. 746, t. 125 ; Hiern in Cat. Afr. PI. Welw. i. 1031 ; Do 

 Wild. & Durand, Contrib. Fl. Congo, i. fasc. 2, 58 ; Do Wild. :^tud. 

 Fl. Bas- et Moy. Congo, i. 122, and Miss. ]^. Laurent, 82 ; Th. & Hcl. 

 Durand, Syll.'Fl. Congol. 513; Muschler, Man. Fl. Egypt, i. 363. 

 C. demersum, var. oxyacantfmm, K. Schum. in Engl. Pfl. Cst-Afr. 

 C. 178. C. oxijacanthum , Cham, in Linnaea, iv. 504, t. 5, fig. 66. 

 C. cristatum, Guill. & Perr. Fl. Seneg. Tent. 296. C. vulgare, Schleid. 

 in Linnrea, xi. 540, t. 11 ; Hook. Niger Fl. 525. CcralofhyUinv sji.^ 

 Oliv. in Trans. Linn. Soc. xxix. 150. 



Upper Guinea, Senegal, (fruiting) PerroUet ! Lagos : Cradu Lake, Rnriv, 

 .3242 ! 



Nile Land. Eritrea: Asmara, at 7500 ft., Schweinfnrth cD Riva, 21081 

 Abyssinia : Begemeder ; Lake Tana. Schimprr, 13H2 ! Sudan : Sennar. Koinchy^ 

 285 ! White Nile, Pefherick ! Kana, Schweinfnrth, 008 • near (lebel MeniRti, 

 (fruiting) Sr.hweinfterth, 1007 ! Bahr-el-Cebel, Brouv, 47 ! mouth of the 

 Bahr-ei-Gehel, Schiveinfurth, 1 128 ! Sobat River, Muriel, 53 ! Bahr-el-Cha/al, 

 (fruiting) Schiveinfurth, 1140 ! above the mouth of the Jur River, (fruiting) 

 Schweinfnrth, 1229 ! Uganda : Unyoro, Speke rf- Grant ! 



Lower Guinea. Angola : Barra do Dande ; in ])ools at the River Dandc, 

 Welwitsch, 524 ! Barra do Bengo ; Lagoa de Quifandongo, at the mouth of 

 the River Bengo, Welwit.'^ch, 525. Icolo e Bengo ; Lagoa de Quilunda, Wel- 

 witsch, 524ft ! Pungo Andongo ; in the River Cuije and near Sansamanda on 

 the Cuanza, (fruiting) Welwitsch, 520 ! Mossamedes ; in the fazenda " Boa 

 Vista," (fruiting) Oossweiler, 55 ! Lower Congo : Kimuenza, Gillet : Stanley 

 Pool, Liijn. Damaraland : Kilevi near Kunene, Schinz, 1 1 ! 



South Central. Belgian Congo : Sankuru River ; Bolombo and l.saka, 

 Laurent. 



Mozamb. Distr. German East Africa : Usambara ; Masheua, Hoht, 3492 ! 

 Portuguese East Africa : Luabo River, Kirk ! Nyasaland : Lower Shin^ River, 

 Kirk ! Scott ! Lake Nyasa, Laws ' Shire Highlands, near Blantyre, (fruiting) 

 Last ! 



Almost cosmopolitan. 



Only a few of the specimens cited above have fruita and such are indicated. 

 The specifie identity of the others cannot be determin(Hl with certainty. Ft)r 

 full synonymy see K. Schum. in Mart. Fl, Bras. iii. iii. 740. 



In the work cited K. Schumann (p. 748) refers to (?. demerfturn, var. apicu- 

 latum, Garcke, as being found in P^ast Tropical Africa, but be mither gives any 

 information as to localities nor cites specimens. According to his description 

 the fruits in this variety are sometimes quiU' unarmed at the ba.se, or they may 

 be furnished with two tubercles, or with short curved or straight oppendages. 



