12<>. CONVOLVULACEAE 171. 



cleft, usualh' campanulate. Stamens 5, epipetalous. Ovary su- 

 perior, 1 — 4 celled, sometimes deeply divided. Ovules 2, rarely 

 1 — 4 in each cell. Styles 1 — 2, sometimes 2 cleft. Seeds endos- 

 permic. 10 genera 45 species. 



1. Leafless climbing parasite without chlorophyll. 10 CUSCUTA. 



Not parasitic. 2. 



2. Ovary lobed or divided. Sepals united below. Creeping herbs, 



3. 

 Ovary entire. Sepals free. 4. 



3. Ovary 4 lobed. Lobes 1 ovuled. Corolla slightly lobed. 



8 FALKIA. 



Ovary 2 lobed. Lobes 2 ovuled. Corolla deeply cleft. Sepals 



nearly free. 9 DICHONDRA. 



4. Style deeply forked, or styles 2. 5. 



Style simple. 6. 



5. Style branches forked. Stigmas not capitate. Leaves small. 



6 EVOLVULUS. 

 Style branches bifid. Stigmas capitate. (Breweria.) 



7 SEDDERA. 



6 Ovary 1 celled. 2 HEWITTEA. 



Ovary 2 — 4 celled. 7. 



7. Stigmas 2 capitate. Pollen grains usually spinous. 



1 IPOMAEA. 

 Stigmas not capitate. 8. 



8. Stigmas linear-oblong. Pollen grains spinous. Leaves and 



stem with stellate hairs. 3 ASTROCHLAENA. 



Stigmas ovate, oblong or filiform. Pollen grains smooth. 9. 



9. Stigmas filiform. Corolla funnel-shaped without well-defined 



midpetaline areas. 5 CONVOLVULUS. 



Stigmas ovate oblong. Corolla with well-defined mid-petaline 

 areas. 4 JACQUEMONTIA. 



1. IPOMAEA L. (Mostly Twiners.) "ijalambu" 



L albivenia Sweet. Tugela Valley and Mooi River. 



2. angustifolia Jacq. Coastbelt. Comnion. 



3. arcryreioides Choisy. Midlands. Not twining. 



4. biloba Forsk. Abundant strand plant. Sea shore. 



5. cardiosepala Hochst, Inanda. 



6. crassipes Hk. Coastbelt. 



crassipes var longepedunculata Hallier. Charlestown. 

 crassipes var thunbergioides Hallier. Estcourt. 

 crassipes var volubilis Hall. Pinetown. 



7. dieritata L. Coast districts. 



8. ficifolia Ldl. Coastbelt. "umKhoka wehlati." 



9. geminiflora Welw. Coastbelt. 



10. gerrardiana Rendle. Near Ladysmith. 

 n. greenstockii Rendle. 



