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 
THE 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 Ofl 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 
