636 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



5. Jatropha polyantha Pax & Hoffm. in Engl. Pflanzenreich IV. 147: 105. 1910, 

 Known only from the type locality, La Orilla, MichoacS-n. 



Frutescent, the branches armed with stinging hairs; leaves about 20 cnu 

 wide, glabrous except for stinging hairs ; flowers white. " Ortiga." 



6. Jatropha calyculata Pax & Hoffm. in Engl. Pflanzenreich IV. 147: 97. 1910, 

 Known only from the type locality, La Pitirem, Michoacan or Guerrero, alti- 

 tude 200 meters. 



Leaves cordate, 10 to 15 cm. wide, armed with needle-shaped hairs, coarsely 

 salient-dentate ; flowers white. " Ortiga." 



Said to lie herbaceous, but inserted here because of its close relationship to 

 some of the other species, most of which become shrubs at times. Roots large 

 and fleshy, employed as a remedy for venereal diseases. 



7. Jatropha urens L. Sp. PI. 1007. 1753. 

 Jatropha hcrbacea L. Sp. PI. 1007. 1753. 



Tamaulipas, San Luis Potosi, Veracruz, Oaxaea, and probably elsewhere. 

 Widely distributed in tropical America. 



Shrub, 3 meters high, or often herbaceous, copiously armed with stinging^ 

 hairs ; leaves 12 to 30 cm. wide ; flowers white, sweet-scented, about 1 cm. long ; 

 seeds grayish, 8 mm. long. "Mala mujer" (Oaxaea, San Luis Potosi, Veracruz,. 

 Tamaulipas); " chichicaste," " chichicaste de burro" (Guatemala); " guarito- 

 to " (Venezuela); " pringamoza " (Colombia). 



The hairs sting the skin painfully, and often cause sores. The thick, fleshy 

 roots are employed locally for venereal and other diseases. 



8. Jatropha rotundifolia Muell. Arg. Linnaea 34: 211. 1865. 

 Known only from the type locality, San Luis (Potosi ?). 



Leaves 4 to 6 cm. wide, deeply cordate at base, repand-dentate ; flowers 7 mm, 

 long. 



8. Jatropha kunthiana Muell. Arg. Linnaea 34: 211. 1865. 



Veracruz. Northern South America ; type from CumanS, Venezuela. 



Shrub, 1 to 1.5 meters high ; leaves 12 to 25 cm. wide ; flowers about 1 cm, 

 long. 



10. Jatropha angustidens (Torr.) Muell. Arg. in DC. Prodr. 15^ 1102. 1866. 

 Cnidoscolus angustidens Torr. U. S. & Mex. Bound. Bot. 198. 1S59. 



Baja California and Sonora to Guerrero and Tamaulipas; type from Santa 

 Cruz, Sonora. 



Herbaceous, or sometimes a shrub 1.5 meters high, densely armed with long 

 stinging hairs ; leaves 10 to 25 cm. wide, long-petiolate, with numerous spine- 

 tipped teeth and shallow lobes ; flowers white, 1 to 1.5 cm. long ; seeds spotted 

 with brown and gray, 8 to* 10 mm. long. " Mala mujer," " mala mujer china "' 

 (Tamaulipas). 



11. Jatropha aconitifolia Mill. Gard. Diet. ed. 8. Jatropha no. 6. 1768. 

 Jatropha papaya Medic. Bot. Beob. (1782) 194. 1783. 



Veracruz, Oaxaea, and Yucatdn. Central America. 



Tree, sometimes 8 meters high ; leaves 15 to 20 cm. wide ; flowers white,. 

 1 cm. long. " Chaya," " picar " (Yucatan) ; " quelite " (Pax). 



Sometimes planted as a shade tree or for hedges. Cultivated plants are 

 occasionally destitute of stinging hairs. 



12. Jatropha andrieuxii Muell. Arg. Linnaea 34: 208. 1865. 

 Type collected between Puebla and Oaxaea. 



Plant densely pubescent throughout ; leaves 15 cm. broad, suborbicular, 

 shallowly lobate; petals 1.5 cm. long. 



