- 7 - 
The species of Derris listed are found in tropical Asia, with the 
exceptions of D. amazo nic a and D. grandifolia , which are tropical American 
species. Except for D. elliptica and D. malac censis , it is doubtful if any 
of these species has a sufficiently high content of active principles to be 
of commercial importance as insecticides. D. pol y ant ha, from Malaya, and 
D. f errugi n ea , an Indian species, have moderate rotenone contents and may 
find local use. 
With the exception of the sample of L. sericeus , which was from the 
Congo, all the species of Lonchocarpus listed are of tropical American 
origin. L. c hrysoph yllus is the "Black Haiari" and "Nekoe", and L. martynii 
the "White Haiari" of the Guianas. They have been the subject of both 
chemical and toxicological investigations (30, 48, 50), and both have a 
moderate rotenone content. Aside from L. urucu and L. utilis, the roots of 
most of the species of Lonchocarpus tested have only moderate or low rotenone 
contents. An exception to this is "Timbo branco," which according to 
Krukoff and Smith (30) averages 7 percent rotenone, but no large quantities 
of the plant exist in the Amazon region. 
In general it appears that of the plants thus far examined a greater 
number of species of L onc hocar pus than of D erris have been found to contain 
moderate or high percentages of rotenone. The highest rotenone content yet 
reported has been that of 20.6 percent in a specimen of L. nicou (L. utilis ?) 
grown in Puerto Rico (55). 
In addition to the plants listed in table 1, there are references 
to other species of legumes in which the presence of rotenone may be con- 
sidered probable. Such references are not accompanied by experimental 
evidence. These species are listed in table 2. 
Table 2. — List of leguminous plants that may contain rotenone or 
rotenoids 
Refe 
rence to possible 
presence of rotenone 
Tribe 
Genus and species 
*Cracca caribea Benth. 
or 
rotenoids 
Galegeae 
(44) 
^Cracca mollis Benth. 
(44) 
*Cracca ochroleuca Benth. 
(44) 
Tephrosia brevipes Benth. 
(32) 
Tephrosia decumbens Benth. 
(44) 
Tephrosia heydeana (Rydb.) Standi. 
(44) 
Tephrosia nicaraguensis Oerst. 
(44) 
Tephrosia nitens Benth. 
(32) 
Tephrosia talpo. Watson 
.(44) 
Dalbergieae 
Lonchocarpus floribundus Benth. 
(L. nitidulus Benth.) 
Lonchocarpus madagascariensis 
(Boivin) R. Viguier 
(30) 
(6) 
*Cracca 
= Benthamantha. 
