102 xc. convolvulace^e (baker and rendle). [Merremicd 



3. M. Jcentrocaulos. 



4. M. tuberosa. 



5. M. dissecta. 



6. M. bipinnatipartita. 



7. M. pterygocaulos. 



8. M. umbellata. 



9. M. spongiosa. 



10. M. quercifolia. 



11. 31. Pes-Draconis. 



Segments entire. 



Stem winged ...... 2. M. alata. 



Stem not winged. 



Capsule narrowly ellipsoid, |-f in. long 

 Capsule ellipsoid-globose, 1^ in. long . 

 Segments grossly dentate .... 



Leaves bipinnatisect ..... 



Sepals 3- in. long ...... 



Corolla about 1 in. long (unknown in 31. spongiosa) 

 Leaves cordate-ovate ..... 



Leaves lanceolate-acuminate .... 



Leaves pinnatilobed ..... 



Leaves palmate-pinnately o-lobed 

 Leaves palmately divided. 



Segments narrow, linear to lanceolate. 



Sepals lanceolate to ovate, acute . . . 12. 31. pedaia. 



Sepals elliptical, obtuse ..... 13. 31. palmata. 



Segments broad. 



Pedicels and sepals glabrous .... 14. M. ampelophylla. 



Pedicels and sepals witb long bairs . . . 15. 3t. pentaphylla. 



Segments pinnatisect . . . . . .16. 31. multisecta. 



Leaves narrowly oblong, with dentate margin . . 17. 31. somalensis. 

 Leaves oblong-ovate with irregularly pandurate 



margins ....... 18. 31. gallabcttensis. 



Corolla i— I in. long. 



Leaves palmately divided . . . . . 19. M. verecunda. 



Leaves pinnatilobed ...... 20. M. xanthophylla. 



Leaves oblong witb tridentate base .... 21. M. tridentata. 



Leaves linear to linear-oblong ..... 22. M. angustifolia. 



Corolla i in. long or less. 



Leaves pinnatisect . . . . . . . 23. M. pinnata. 



Leaves reniform ....... 24. M. emarginata. 



Leaves cordate ....... 25. M. convolvulacea. 



1 . M. Turpethum, Rendle. Stems slender, twining, finely pube- 

 scent. Leaves cordate-ovate, entire, acute, 1-2 in. long, finely pubescent 

 on both sides; basal lobes very short, obtuse, entire; petiole 6 lin. long. 

 Flowers solitary in the axils of the leaves ; peduncles pubescent, 1-1 J in. 

 long, articulated at the middle. Calyx f-1 in. long ; two outer sepals, 

 elliptic, obtuse, pubescent, hiding the inner. Corolla broadly cam- 

 panulate, 1^ in. long, glabrous outside. Stamens half as long as the 

 corolla. Capsule (not seen in African specimens) surrounded by the 

 large tough accrescent sepals, globose, G-9 lin. long; endocarp thin 

 membranous; seeds typically 4, large, smooth. — Ipomoea diplocalyx, Baker 

 in Kew Bulletin, 1894, 71. /. Turpethum, R. Br. Prodr. 485. Oper- 

 culina Tmyethitm, Silva Manso, Enum. Subst. Braz. 16. Spiranthera 

 Turpethum, Bojer, Hort. Maur. 226. 



Mozamb. Sist. Portuguese East Africa : Zambesi delta, near Vicenti, 

 Scott ! 



Also in Tropical Asia, Australia, Polynesia, and the Mascarenc Islands. 



2. M. alata, Rendle. A glabrous climber. Stems stout, hollow, 

 conspicuously 4-winged on the older portions. Leaves large, thinly 



