254 LXXXIV. CONVOLVYULACES. 
fleshy roots. The “Sweet Potato” (B. edulis) is the type of the genus. 
B. paniculata, or “Natal Cotton-plant,’”’ a widely-dispersed tropical species, 
grows at Natal. It has palmate, 5-7-fid leaves, many-flowered peduncles, 
purple flowers, and seeds covered with long coarse hairs. 
2. PHARBITIS, Chois. 
Sepals5. 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. hispida, Chois. (Convolvulus 
major of Garden), occurs as an escape from gardens. 
3. IPOMGBA, 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. 348. 
A very 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-shaped. Style 1; stigmas 
2, linear-cylindrical, often revolute. Ovary 2-celled; cells 
2-ovuled. Capsule 2-celled.—DC. Prod. 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 
the 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. Prod. ix. p. 
429, 
Mostly tropical plants, differing from Zpomea in the calyx.—A. calyste- 
gioides, Ch. (Ipomea crassipes, Hook. Bot. Mag. t. 4068), grows at Natal. 
6. CALYSTEGIA, R. 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- 
celled.— DC. Prod. ix. p. 483. 
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. sepium), extensively cultivated in temperate regions, 
and indigenous in Australia and Chili, as well as in England, but not in 
South Africa. 
