STANDLEY TREES AND SHRUBS OF MEXICO. 613 



Leaves thin, pale and densely and very finely 

 stellate-pubescent on the upper surface. 



43. C. rhamnifolius. 

 Leaves palmate-nerved, the basal nerves (usually 5) 

 very conspicuous. 

 Lobes of the capsule compressed and acutish above. 



43. C. flavescens. 

 Lobes of the capsule broadly I'ounded. 



Upper leaf surface pale, nearly or quite as densely 

 pubescent as the lower. 

 Leaves cordate at base, very short-petiolate ; 



large shrub 44. C. magdalenae. 



Leaves not cordate at base, long-petiolate ; very 



' low shrub 36. C. corymbulosus. 



Upper leaf surface bright green, usually glabrate. 

 Leaves glabrous or nearly so beneath at ma- 

 turity. 

 Leaves very scabrous on the upper surface, 

 the hairs with enlarged bases. 



45. C. calvescens. 

 I>eaves not scabrous, the hairs without en- 

 larged bases 46. C. sonorae. 



Leaves persistently and copiously pubescent 

 beneath. 

 Pubescence of the lower leaf surface fine and 



appressed 47. C. fragilis. 



Pubescence of the lower leaf surface coarse 

 and spreading. 

 Capsule finely stellate-puberulent. 



48. C. frutlculosus. 

 Capsule coarsely stellate-pillose. 



49, C. morifolius. 



1. Croton g'labellus L. Amoen. Acad. 5: 409. 1760. 

 Croton schiedeanm Schlecht. Linnaea 19: 243. 1847. 



Veracruz and Tabasco. Central America, West Indies, and northern South 

 America. 



Shrub or small tree, the pubescence of small brown scales ; leaves oblong- 

 elliptic or oblong-ovate, 5 to 20 cm. long, short-petiolate, abruptly short-acu- 

 minate, entire, glabrate ; flowers in long slender racemes ; capsule coarsely 

 tuberculate. " CopalchI " (Tabasco, Costa Rica); " caobilla " (Veracruz 

 Ramirez) ; " quizarra copalchi " (Costa Rica). 



The wood is said to be strong, fine-grained, and durable. 



2. Croton niveus Jacq. Stirp. Amer. 255. pi. 162. f. 2. 1763. 

 Croton pseudo-cMiia Schlecht. Linnaea 5: 84. 1830. 

 Croton arhorens Milllsp. Field Mus. Bot. 1 : 303. pi. 15. 1896. 



Colima to Tamaulipas. Yucatan, and Chiapas. Central America, northern 

 South America, and West Indies ; type from Cartagena, Colombia. 



Shrub or tree (said sometimes to attain a height of 18 meters), the pu- 

 bescence of silvery scales; leaves ovate or broadly ovate, 5 to 12 cm. long or 

 larger, acute or acuminate, usually somewliat cordate at base, entire ; fioy,'ers 

 in long or short racemes; capsule about 9 mm. long. " Quina " (Oaxaca) ; 

 "quina blanca " (Veracruz); "copalchi" (Veraci'uz, Oaxaca, Costa Rica, El 



