70 EUPHORBIACEJ:. — URTICACE^. Drypetes. 



EUPHORBIACE^E. 



219. Drypetes crocea, Poit. 

 Guiana Plum. White-wood. 



Semi-tropical Florida, — Bay Biscayne to the southern keys ; in the 

 West Indies. 



A small tree, sometimes 9 metres in height, with a trunk 0.12 to 0.17 

 metre in diameter. A little-known form (var. latifolia, Mull.) with whit- 

 ish warty branches, the calyx 5-parted, and more coriaceous leaves, should 

 perhaps be considered a distinct species (D. glauca, Nutt.). 



Wood heavy, hard, not strong, brittle, close-grained, checking in dry- 

 ing ; medullary rays numerous, thin ; color rich dark brown, the sap-wood 

 yellow. 



220. Sebastiania lucida, Mull. 

 Crab-wood. Poison-wood. 



Semi-tropical Florida, — Bay Biscayne to the southern keys ; common ; 

 in the West Indies. 



A small tree, sometimes 9 metres in height, with a trunk 0.15 to 0.20 

 metre in diameter ; the large specimens generally hollow and decayed. 



Wood very heavy, hard, very close-grained, compact, susceptible of a 

 beautiful polish; medullary rays numerous, obscure; color rich dark 

 brown streaked with yellow, the sap-wood bright yellow ; now largely 

 manufactured into canes and furnishing valuable fuel. 



221. Hippomane Mancinella, L. 

 Manchineel. 



Southern keys of semi-tropical Florida ; common ; in the West Indies 

 and Central America. 



A small tree, in Florida rarely exceeding 4 metres in height, with a 

 trunk 0.12 to 0.17 metre in diameter; abounding in white milky ex- 

 ceedingly caustic poisonous sap. 



Wood light, soft, close-grained, compact, containing numerous eveidy 

 distributed small open dints; medullary rays numerous, obscure; color 

 dark brown, the thick sap-wood light brown or yellow. 



URTICACE^E. 



222. Ulmus crassifolia, Nutt. 



Cedar Elm. 



Southern Arkansas, and Texas to the valley of the Rio Grande. 

 A tree 18 to 20 metres in height, with a trunk 0.60 to 0.90 metre in 

 diameter, or toward its southern or southwestern limits much smaller ; 



