- 27 - 
Yoruba .indigo. Later (239) Kcw Gardens reproduced the drawing of this species 
that is given in Hiker's Iconcs Plantarum. Maguire (266) in 1906 in an ac- 
count of West African dyeing methods inserted, a footnote which statec 1 that, one 
shade of dark blue used at Sierra Leone is, .according to Aug. Chevalier, not 
indigo, Tout the product of a liana, L oncho carpus cyanescens . Perkins' (318) 
work on indigo fron Lonchocarpus cyanescens (called the Gara plant in Sierra 
Leone) was reviewed "by the Inperial Institute of Great Britain (215 and 216) 
in 1907 and 1909. In Great Britain (173), Miscellaneous Colonial Report 
Fo. 51, Thompson in 1908 reported that in the Manu forests of the Westorn 
Provir.cc of southern Nigeria- there was noticed Lonchocarpus cyanescens , fron 
the leaves of which the bulk of the indigo used by the natives of the Western 
Province is extracted, 
F. H. Bailey (11) in 1909 described two species of Lonchocarpus grow- 
ing in Queensland, L. blackii Benth. and L. nesiotes Bail. The former species, 
called bloodbark, exud.es a blood-red juice which on exposure dries to a 
brownish gun containing arabir. 3.8 percent, resin 1.4 percent, tannic acid 
74.2 percent, and. water 20.6 yQ rcont. 
The Kandelsnuseun of the Koloniaal Instituut of Aisterdan (248) in 
1934 reported analyses of 3 samples of nekoe root (L. chrysox^hyllus Kleinh. ). 
These tested fron 1.2 percent to 2.5 percent rotenane, average 2 percent. 
Banners (27) in October 1935 submitted (through Concannon) a sample 
of nekoe from Dutch Guiana to the Division of Irisscticide Investigations which 
was found to be apparently L. nicou . The root contained only 0.8 percDnt 
rotenone and 3,5 percent total carbon tetrachloride extractives, and a quali- 
tative test revealed- the rjresence of rotenone in the stem. 
Tattersfield (399) in 1936 published a valuable review of recent work 
on fish poison plants as insecticides, 
"Some samples of cube and timbo have been found with very 
high rotenone-content, occasional srjecimens of the former contain- 
ing as much as 12 ocrccnt rotenone and. of the latter one as high 
as 15-16 percent have been reported, but these are exceptional. 
Commercial samples of cube examined at ttothamsted have usually 
ranged from 5-6 percent and good samples of Derris elliptica have 
touched. 8-9 jpercent. There is, however, little or no question that 
these South American i^lants are being produced in continually in- 
creasing amounts and that in course of tine competition with d.erris 
is likely to be severe. 
"It has been recently established that the White Haiari of • 
British Guiana is Lonchocarpus nicou (Aubl.) DC. and cons-pecific 
with cube of Peru, thus there are obviously several strains of this 
plant which differ somewhat widely in rotenone-content. Haiari 
plants taken fron forests of British Guiana, and fron their appear- 
ance of nany years' growth, analyzed at Rothamsted, showed appreci- 
able amounts of rotenone. Black Haiari roots contained over 3 per- 
cent and the stems about 0.8 percent. White Haiari roots gave 1.8 
