UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 1057 



Contribution from the Bureau of Plant Industry 

 WM. A. TAYLOR, Chief 



Washington, D. C. 



PROFESSIONAL PAPER 



April 24„ 1922 



T.HE CHAULMOOGRA TREE AND SOME 

 RELATED SPECIES 



A SURVEY CONDUCTED IN SIAM, 

 BURMA, ASSAM, AND BENGAL 



By 



JOSEPH F. ROCK 



Agricultural Explorer, Office of Foreign Seed and Plant Introduction 



With an Introductory Chapter by DAVID FAIRCHILD, Agricultural 

 Explorer in Charge of the Office of Foreign Seed and Plant Introduc- 

 tion, and a Chapter on the Chemistry of Chaulmoogra, Hydnocarpus, 

 and Gynocardia Oils by FREDERICK B. POWER, Chemist in Charge 

 of the Phytochemical Laboratory of the Bureau of Chemistry 



CONTENTS 



Page 



Introduction' 1 



History of Chaulmoogra Oil 3 



Chemistry of Chaulmoogra, Hydnocarpus, 



and Gynocardia Oils 7 



Recent Information on the Chaulmoogra 



Tree and Some Related Species ... 10 



Hydnocarpus anthelminthica 10 



Hydnocarpus castanea 12 



Hydnocarpus curtisii 14 



Page 



Recent Information on the Chaulmoogra 

 Tree and Some Related Species— Con. 



Taraktogenos kurzii 15 



Asteriastigma macrocarpa 22 



Gynocardia odorata 23 



Conclusions 24 



Recommendations 26 



Literature Cited 28 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1922 



