140 THE AMERICAN BOTANIST 



Copaifer Guilbourtiana. Sierra Leone Copal. 



Danicllia ogca. Ogea. Southern Nigeria. 



Dorenia ammoniacum. Gum Ammoniacum. Persia, 

 Afghanistan. 



Mimusops globosa. Chicle. Central America. The 

 basis of most chewing gums. 



Lac, Shellac. Produced by the lac insect (Tachardia 

 lacca) which feeds upon a variety of plants in the warmer 

 parts of Asia. 



RUBBER AND GUTTA PERCHA. 

 Hcvca Brasilcnsis. Para Rubber. Brazil, East Indies. 

 Manihot Glazovii. Ceara Rubber. Brazil, East Africa. 

 Ficus clastica. Assam Rubber. East Indies. 

 Funtuinia clastica. West African Tree Rubber. 

 Landolphia spp. African Vine Rubber. Tropical Africa. 

 Castilloa clastica. Central American Rubber. 

 Ficus Vogclii. Abba Rubber. West Africa. 

 Hancornia spcciosa. Mangabeira Rubber. Brazil. 

 Sapium spp. Columbian Rubber. Northwestern South 

 America. 



Parthcnium argcntahtm. Guyale. Mexico. 

 Palaquium Gutta. Gutta percha. East Indies. 

 Dycra costulata. Pontianak gutta. Borneo. 



