26 BULLETIN 1057, U. S. DEPARTMENT OF AGRICULTURE. 
carpus anthelminthica, require slightly different conditions; but all 
species of Hydnocarpus and Taraktogenos require well-drained 
sandy or loamy silt soils and grow best along creek beds or on the 
banks of streams. All require climates necessary for an evergreen 
rain forest, such as is found in Burma and elsewhere in India. 
RECOMMENDATIONS. 
Owing to the insufficient knowledge we possess regarding the 
species of both Hydnocarpus and Taraktogenos, and even of such 
an important species as Taraktogenos kurzii, the writer would recom- 
mend that a thorough survey be made of all the known species. All 
the given localities, as far as possible, should be visited and com- 
plete material collected. Seeds should be secured in quantities, both 
for germination and for chemical examination. Photographs should 
be taken of each species in its native haunt and fresh specimens 
should be photographed. Soil samples should be taken for chemical 
analysis and all such data should be gathered as plant associations, 
native names, medicinal uses, etc. The whole group of Pangieae, 
especially the species of Taraktogenos, Hydnocarpus, and Asteri- 
astigma, should be thoroughly monographed. Complete fruits as 
well as flowering material should be preserved in formalin, and 
wood samples should also be taken. 
During the writer's stay in Calcutta, he worked on this group 
of plants in the Sibpur Botanic Garden Herbarium, the re- 
pository of King's types, and found among the material (which 
is at best fragmentary) possibly fifteen undescribed species of 
either Hydnocarpus or Taraktogenos. Complete notes were taken 
as well as photographs of the described and undescribed species; in 
nearly every instance detailed information is given as to localities, 
so that it will be very easy to locate these species. A survey of this 
group would be of great humanitarian interest, as among the many 
species of Hydnocarpus and Taraktogenos some may be found of 
more value from a pharmaceutical standpoint than Taraktogenos 
kurzii. Asteriastigma macrocarpa especially should be investigated. 
If plantations are to be established it is of the utmost value to know 
which of the numerous species should be planted. The best yielder 
of fruits, the largest fruited, and those yielding the proper oil in 
largest quantity should be selected. Special attention should also be 
given to climatic and soil conditions and environment. 
The chemical part of this work would be of the greatest interest, 
for as yet complete investigations have been made only of the oils 
from Taraktogenos kurzii, Hydnocarpus wightiana, H. anthelminth- 
ica, and the so-called false chaulmoogra (Gynocardia odorata) . Less 
