1204 CONTRIBUTIOlSrS FROM THE NATIONAL HERBAKIUM. 



Stems hirsute. 



Corolla 7 to 9 cm. long 11. I. lambii. 



Corolla 4 to 6 cm. long. 



Pubescence of the stems retrorse 12. I. hirtiflora. 



Pubescence of the stems spreading 13. I. igualensis. 



Inflorescence cymose, the bracts inconspicuous 14. I. ampullacea. 



' Sepals coriaceous or membranaceous, not elongate; ovary usually 2 or 4- 

 celled. 

 Seeds with long dorsal or marginal hairs, these longer than the seed or the 

 seeds covered with long hairs. 

 Inflorescence racemose; seeds covered on all surfaces with long hairs. 



15. I. bombycina. 

 Inflorescence cymose; seeds with dorsal or marginal hairs only. 

 Sepals hirsute, tomentose, or sericeous. 



Sepals hirsute 16. I. crinita. 



Sepals tomentose or sericeous. 



Corolla white 17. I. praecana. 



Corolla purple 18. I. carnea. 



Sepals glabrous or nearly so. 



Sepals about 7 mm. long 19. I. populina. 



Sepals 10 to 20 mm. long 20. I. scopulorum. 



Seeds glabrous or finely pubescent. 

 Sepals very unequal. 

 Sepals cuspidate. 



Stems pilose 21. I. purpusi. 



Stems glabrous 22. I. jicama. 



Sepals obtuse or acutish. 



Leaves subsessile 23. I. sagittula. 



Leaves long-petiolate. 



Leaves 3 or 5-lobate 24. I. vulsa. 



Leaves entire or dentate. 



Corolla yellow 25. L lindenil. 



Corolla white or purple. 



Corolla white, 4 to 5 cm. long 26. L anisomeres. 



Corolla purple, 2 cm. long 27. I. oligantha. 



Sepals equal or nearly so. 



Corolla salverform 28. L chenopodiifolia. 



Corolla funnelform or campanulate-funnelform. 



Corolla blue or purple 29. I. morelii. 



Corolla white. 



Leaves rounded at base 30. I. robinsonii. 



Leaves cordate at base 31. I. dimorphophylla. 



1. Ipomoea crassicaulis (Benth.) Robinson, Proc. Amer. Acad. 51: 530. 1916. 



Batatas crassicaulis Benth. Bot. Voy. Sulph. 134. 1S44. 



Ipomoea flstulosa Mart.; Choisy in DC. Prodr. 9: 349. 1845. 



Ipomoea texana Coulter, Contr. U. S. Nat. Herb. 1: 45. 1890. 



Sinaloa to Nuevo Le6n, Tamaulipas, Veracruz, and Chiapas, probably only 

 naturalized northward. Texas; Central and South America. 



Shrub, usually 1 to 2 meters high ; leaves ovate-cordate to lance-cordate, 8 

 to 26 cm. long, long-acuminate, minutely puberulent or glabrous, entire; co- 

 rolla 5 to 8 cm. long. " Hiedra de la India" (Sinaloa) ; " bar6s " (Tamaulipas, 

 Wooton) ; "palo santo de Castilla" (Sinaloa); " chilco," " campanilla," 

 "campanola" (El Salvador). 



It is reported from Brazil that the leaves are poisonous to goats. 



