Hewillia.] xc. convolvulace.e (baker and rendle). 101 



486 ; Hiern in Cat. Afr. PI. "YVelw. i. 727. Aniseia Afzelii, G. Don, Gen. 

 Syst. iv. 295. Ipoimza Afzelii, Choisy in DC. Prodr. ix. 373 ? /. 

 benguelensis, Baker in Kew Bulletin, 1894, 69. /. phyllosepala, Baker 

 I.e. /. ? teretistigma, Choisy in DC. Prodr. ix. 373. Bonamia Volkensii, 

 Dammer in Engl. Pfl. Ost-Afr. C. 329. 



Upper Guinea. ( lambia, Brown-Lestev, 26! Sierra Leone, Afzelius ! Don! 

 Scott-Elliot, 4111 ! Liberia : Cape Palmas, Vogel, 14 ! 59 ! Ashanti, Cummins, 

 40 ! Togo, Kling, 37. Lagos, Milieu, 76 ! Barter, 20160 ! Abeokuta, Irvine/, 

 120 ! Barter, 3351 ! Cainevoons, Johnston ! Zenker and Standi, 631 ! 



Nile Land. Somaliland : Ganane River, Riva, 378; Web River, near 

 Karanle, Riva, 990. Banks of Upper Nile, Speke 8f Grant. Niamniam, 

 Schweinfurth; 2953! Uganda, Whyte ! Scott-Elliot, 7313! Ruwenzori, Scott- 

 Elliot, 7537 ! British East Africa : Kavirondo, Whyte ! Kiroruma River, Gregory ! 

 River Vena, Eassner, 111 ! 127 ! Schimb.i Mountains, Edssner, 219 ! Ribe, 

 Wakefield ! Mombasa, Riva, 1748. 



Lower Guinea. Gaboon, Soyanx, 436 ! Bultner, 381. Lower Congo : 

 Kisantu, Gillet, 262 ; and without precise locality, Smith ! Burton ! French 

 Congo : Bata, DinMage, 1189. Angola : Golungo Alto, Welwitsch, 6221 ! 6225 ! 

 Ambaca, Welwitsch, 6224 ! Bumbo, Welwitsch, 6127 ? Loanda, Gossiveiler ! 



South Central. Congo Free State : between the Rivers Lubilasch and 

 Lomami, Pogge, 1026 ; Nyangwe, Pogge, 1150. 



IVIozomb. 3>ist. Zanzibar, Bojer. German East Africa : Karagwe ; Kagera 

 Kiver, Bagshawe, 31 ! Dar es Salem, Eirk ! Usambara, Eolst, 490, 527a, 2049! 

 Edssner, 14 ! Kilimanjaro ; Marangn, Volkens, 13S9. Portuguese East Africa : 

 Lupata and Shupanga, Eirk ! Morambala, Eirk ! Caboceira and Rio de Sena, 

 Peters. British Central Africa : Nyasaland, Buchanan, 487 ! Whyte! Meller ! 



Also Natal and Tropical Asia. 



19. MEREEMIA, Dennst. ; Hallier f. in Engl. Jahrb. xvi. 581 (incl. 



Operculina). 



Sepals 5, generally subequal, and more or less coriaceous, elliptic 

 or lanceolate, more rarely orbicular, accrescent in the larger species. 

 Corolla campanulate to broadly infundibuliform, often white, some- 

 times yellowish ; midpetaline areas generally not well denned. Anthers 

 usually twisted above. Pollen not spiny. Ovary 2-4-celled, 4-ovuled ; 

 style and stigma of Ipomcea. Capsule with generally valvular, rarely 

 transverse dehiscence. Seeds generally 4, glabrous. — Annual or perennial 

 plants, with generally herbaceous climbing, more rarely prostrate or 

 trailing stems and axillary flowers, solitary or in few- to many-flowered 

 dichasial cymes. 



Species about 60, widely spread in the tropics. 



I cannot distinguish generically the larger-flowered and fruited species which 

 have been regarded as forming a distinct genus Operculina. The transverse dehis- 

 hiscence of the fruit is not general in this small group ; in one of its most typical 

 members, I. kentrocaulos, the large capsule splits longitudinally, the valves separating 

 from the central septum, which bears the remains of the style. 

 Corolla li-2^ in. long. 

 Sepals §— 1 in. long. 



Leaves cordate-ovate, entire . . . 1. M. Turpethum. 



Leaves palmately cut. 



