251- LXXXIV. COXA'OLVULACE^. 



fleshy roots. Tlie " Sweet Potato " {B. eduJis) is the type of the genus. 

 B. paniciilafa, or " Natal Cotton-jilant," a widely-dispersed tro'pical species, 

 grows at Natal. It has palmate, 5-7-fid leaves, mauy-flowered peduncles, 

 purple flowers, and seeds covered with long coarse hairs. 



2. PHARBITIS, Chois. 



Sepals 5. Corolla bell- or bell-funnel-shaped. Style single ; 

 stigma capitate-granulate. Ovary 3-, rarely 4-celled ; cells 2- 

 ovuled. 



Tropical and chiefly American plants. — P. Mspida, Chois. (Convolvulus 

 major of Garden), occurs as an escape from gardens. 



3. IPOMCEA, Linn. 



Sepals 5. Corolla bell- or funnel-shaped. Stamens in- 

 cluded. Style 1 ; stigmas capitate, mostly 2-lobed. Ovary 

 2-celled ; cells 2-seeded. Capsules 2-celled. — DC. Prod. ix. 

 p. 34^8. 



A yeiy large, tropical and subtropical genus, very various in habit. — 

 Many species on the Eastern frontier and in Natal. 



4. CONVOLVULUS, Linn. 



Sepals 5. Corolla bell- or funnel-sliaped. Style 1 ; stigmas 

 2, linear-cylindrical, often revolute. Ovary 2-celled; cells 

 2-ovuled. Capsule 2-celled.— Da Frod. ix. p. 399. 



A large genus, chiefly of temperate climates, varied in habit. — Several 

 species, dispersed through the colony. 



5. ANISEIA, Chois. 



Sepals 5, in 2-3 rows, the 2 outer larger, inserted below 

 tbe rest and decurrent on the peduncle, the third interme- 

 diate ; and two inner ones smaller. Corolla bell-shaped. 

 Style 1 ; stigma 2-lobed, capitate or often flattened. Ovary 

 2-celled ; cells 2-ovuled. Capsules 2-celled. — DC. Frod. ix. p. 

 429. 



Mostly tropical plants, diifering from Ipomcea in the calyx. — A. calyste- 

 gioides, Ch. {Ipomoea crassipes, Hook. Bot. Mag. t. 4068), grows at Natal. 



6. CALYSTEGIA, E. Br. 



Two opposite bracts concealing the calyx. Sepals 5, equal. 

 Corolla bell- or funnel-shaped. Style 1 ; stigma 2-lobed, lobes 

 linear or flattened. Ovary imperfectly 2-celled, becoming 1- 

 ceWed.— DC. Frod. ix. p. 433. 



Herbs, with the habit of Convolvulus, known at once by the bracts en- 

 closing the calyx. To this genus belongs the common English White 

 Hedge-convolvulus (C. sepj'ium), extensively cultivated in temperate regions, 

 and indigenous in Australia and Cliili, as well as in England, but not in 

 South Africa. 



