UNITED STATES DEPARTMENT OF AGRICULTURE 
II 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 Introduction, 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. 
Pago. 
Introduction 1 
History of chaulmoogra oil 3 
Chemistry of chaulmoogra, hydno- 
carpus, and gynocardia oils 7 
Recent information on the chaulmoo- 
gra tree and some related species. 10 
Hydnocarpus anthelminthica 10 
Hydnocarpus castanea 12 
Hydnocarpus curtisii 14 
Page. 
Recent information on the chaulmoo- 
gra tree and some related species — 
Continued. 
Taraktogenos kurzii 15 
Asteriastigma macrocarpa 22 
Gynocardia odorata 23 
Conclusions 24 
Recommendations 265 
Literature cited 28 
INTRODUCTION. 
By David Fairchild, Agricultural Explorer in Charge of the Office of Foreign 
Seed and Plant Introduction. 
Although chaulmoogra oil has been in use for hundreds of years 
by the natives of India in the treatment of leprosy, it is only re- 
cently that a general public interest has been aroused in it. This is 
due to the successful treatment of the disease with certain con- 
stituents of the oil by Drs. Hollmann, Dean, and McDonald, in the 
Hawaiian Islands, (11, 15, 16) J 1 
Whereas the East Indians used the crude oil expressed from the 
seeds as a local application and also internally, the above-mentioned 
1 The serial numbers (italic) in parentheses refer to 
this bulletin. 
83466—22 1 
Literature cited " at the end of 
