STANDLEY TREES AND SHRUBS OF MEXICO. 635 



Leaves borne on long slender petioles. 

 Leaves and pistillate sepals glandular-ciliate. 



Staniinate sepals ciliate; leaves mostly acuminate.__20. J. cordata. 

 Staminate sepals eciliate ; leaves acutish or rounded and short- 

 pointed 21. J, vernicosa. 



Leaves and sepals not glandular-ciliate. 



Leaves pubescent on one or both surfaces 23. J. cinerea. 



Leaves glabrous on both surfaces. 



Leaves broadly rounded or emarginate at apex. 



Leaves acute or acuminate 24. J. cercidiphylla. 



Leaves 5 to 10.5 cm. wide, entire 29. J. g'aumeri. 



Leaves 1.5 to 2.5 cm. vv^ide, crenate 22. J. cardiophylla. 



Cymes large, much branched, broad. 



Leaves conspicuously peltate 25. J. platyphylla. 



Leaves not peltate. 



Teeth of the leaves ending in stipitate glands 26. J. olivacea. 



Teeth (if present) without stipitate glands. 



Cymes sessile ' 27. J. alamani. 



Cymes pedunculate. 

 Leaves all or mostly entire. 



I^eaves obovate 28. J. sympetala. 



Leaves cordate. 



Branches of the inflorescence glabrous 29. J. gaunieri. 



Branches of the inflorescence densely pilose. 



30. J. yucatanensis. 

 Leaves, at least most of them, conspicuously lobate or angulate. 



Leaves glabrous or glabrate at maturity 31. J. curcas. 



Leaves densely pubescent beneath at maturity. 

 Leaves densely tomentose beneath, puberulent or thinly tomen- 



tulose on the upper surface 32. J. rufescens. 



Leaves villosulous beneath, velvety-pilose on the upper surface. 



33. J. pseudocurcas. 



1. Jatropha palmeri S. Wats. Proc. Amer. Acad. 24: 76. 1S88. 

 Sonora and Baja California ; type from Guaymas, Sonora. 



Shrub ; leaves long-petiolate, orbicular or flabellate, coarsely dentate, pubes- 

 cent on both surfaces. 



2. Jatropha tubulosa Muell. Arg. Linnaea 34: 212. 1865. 

 Jatropha jtirgensenii Briq. Ann. Cons. Jard. Geneve 4: 229. 1900. 

 ? Jatropha tepiquensis Cost. & Gall. Rev. G^n. Bot. 18: 388. 1906. 

 Tepic(?) to Puebla and Oaxaca. Central and Sonth America. 



Shrub or small tree, armed with long stiff stinging hairs; leaves about 20 cm. 

 wide ; flowers white ; capsule covered with stinging hairs. " Mala mujer " 

 (Pea;). 



3. Jatropha multiloba Pax in Engl. Pflanzenreich IV. 147: 107. 1910. 

 Tamaulipas and Veracruz ; type from Orizaba, Veracruz. 



Shrub or small tree, sometimes 3.5 meters high, with few thick branches; 

 leaves 20 to 25 cm. wide, densely velvety-puberulent ; flowers white, about 1 

 cm. long. "Mala mujer lisa " (Tamaulipas). 



4. Jatropha liebmannii Muell. Arg. Linnaea 34: 212, 1865. 

 Known only from the type locality, Tehuanac, Veracruz. 

 Leaves 3 to 7-parted, puberulent when young. 



