STANDEE Y TREES AND SHRUBS OF MEXICO. 619 



40. Croton cortesianus H. B. K. Nov. Gen. & Sp. 2: 83. 1817. 

 Croton tricliocarpus Torr. U. S. & aiex. Bound. Bot. 196. 1859. 



Sinaloa to Taniaulipas, Campeche, and Chiapas ; type collected near 

 Canipeche. Western Texas. 



Shrub, 1 to 3 meters high ; leaves mostly oblong-ovate, 3 to 10 cm. long, 

 short-petiolate, acute or acuminate, rounded or subcordate at base, stellate- 

 pubescent beneath, bright green above ; racemes often very long. " Palillo " 

 (Taniaulipas, San Luis Potosi) ; " pozual," "puzual" (San Luis Potosi Seler) ; 

 " ek-balam " (Maya, Seler); " pinolillo " (Taniaulipas). 



The juice is applied as a caustic for the treatment of skin diseases. 



41. Croton miradorensis Muell. Arg. in DC. Prodr. 15^: 627. 1866. 

 Veracruz ; type from Mirador. 



Shrub ; leaves ovate or oblong-ovate, 6 to 12 cm. long, acute or acuminate, 

 rounded or subcordate at base, stellate-tomentose beneath. 



42. Croton rhamnifolius H. B. K. Nov. Gen. & Sp. 2: 75. 1817. 



Yucatan to Oaxaca. West Indies and South America ; type from Venezuela. 



Shrub, 1 to 2 meters high ; leaves oblong to ovate, 4 to 7 cm. long, short- 

 petiolate, acute, densely stellate-tomentose l>eneath, entire, or near so. 

 ^' Ecbalan," " xa-balam " (Yucatan). 



This has been reported from Yucatan as C. cortesianus. 



43. Croton flavescens Greenm. Proc. Amer. Acad. 39: 81, 1903. 

 Southwestern Chihuahua to Guerrero; type from Monte Leon Station, 



Michoacrin, altitude 1,500 meters. 



Shrub, 1.5 to 2.5 meters high ; leaves broadly ovate-cordate, 6 to 11 cm. long, 

 usually long-acuminate, entire, densely stellate-pubescent beneath. 



44. Croton magdalenae Millsp. Proc. Calif. Acad. II. 2: 220. 1889. 

 Baja California ; type from Magdalena Island. 



Shrub, 1 to 8.5 meters high, very densely and finely stellate-tomentose 

 throughout ; leaves broadly cordate-ovate or rounded-cordate, 4 to 10 cm. long, 

 acutish, short-petiolate, entire ; racemes longer than the leaves. 



45. Croton calvescsns S. Wats. Proc. Amer. Acad. 26: 147. 1891. 

 .Jalisco and Michoacan ; type from Chapala, .Jalisco. 



Shrub, green, pubescent at first but soon glabrate ; leaves ovate or broadly 

 ovate, acute or acuminate, rounded at base, 5 to 8 cm. long, serrulate; flowers 

 in very long slender spikes. 



46. Croton sonorae Torr. U. S. & Mex. Bound. Bot. 194. 1859. 

 Croton pringlei S. Wats. Proc. Amer. Acad. 12: 373. 1885. 

 Croton gonzalczii Greenm. Proc. Amer. Acad. 39: 81. 1903. 

 Sonora to Oaxaca ; type from Sonora. 



Slender shrub, 1 to 2 meters high, green and glabrate ; leaves ovate or 

 broadly ovate, 2 to 5 cm. long, long-acuminate, rounded at base, short-petiolate ; 

 racemes very slender and lax. 



47. Croton fragilis H. B. K. Nov. Gen. & Sp. 2: 75. 1817. 



Croton sericeiis Schlecht. lannaea 5: 85. 1830. Not C. sericeus Lam. 1786. 



Sinaloa to Veracruz, I'^ucatan, and Chiapas. Northern South America ; type 

 from CumanJl, Venezuela. 



Slender shrub, 1 to 4.5 meters high ; leaves long-petiolate, lanceolate to 

 broadly cordate-ovate, acute to long-acuminate, bright green above, whitish 

 beneath ; racemes long and slender, the flowers brownish yellow. " Taanch6 " 

 (Yucatan). 



The material referred here is very variable, and probably represents two 

 or more species. 



