CAFFEINE-YIELDING PLANTS 191 



This species Is the principal source of the Cola Nut or Gourou, 

 and contains, on the average, about 2.3% caffeine. 



Geographical Distribution: — Indigenous In West Africa from 

 Rio Nunez south through the Congo. Cultivated in the West Indies 

 and most tropical countries. 



Cola astrophora Warb. Stercullaceae Seed 



Geographical Distribution : — Togo region, No. West Africa, 



Cola anomala K. Schum. 



Geographical Distribution: — Tropical West Africa. 



Cola Ballayi Cornu 



Geographical Distribution : — Tropical West Africa. 



Cola digit at a Masters 



Geographical Distribution: — Kamerun ; Gabon. 



Only 0.26% caffeine. 



Cola gabonensis Masters 



Geographical Distribution : — ^Gabon. 



Cola Johnsonii Stapf 



Geographical Distribution: — Tropical West Africa. 



Cola lepidota K. Schum. 



Geographical Distribution : — Kamerun. 



Cola pachycarpa K. Schum. 



Geographical Distribution : — Kamerun ; Congo. 



Cola spaerosperma Heckel 



Geographical Distribution : — Gabon. 



Cola sublobata Warb. 



Geographical Distribution: — Aschanti region. 



Cola verticillata Stapf 



Geographical Distribution: — Tropical West Africa. 



The fruits of some species are edible. The fruits of certain species, 

 for example Cola Supfiana Busse of the Togo region and Cola cordi- 

 folia (Cav.)R.Br. of Senegambia and Togo regions, contain no 

 caffeine. There are doubtless species additional to those listed above 

 which are used as adulterants and as substitutes for Cola acuminata 

 (Beauv. ) Schott & Endl., and v^^hlch are devoid of caffeine; but I am 

 unable to obtain reliable information concerning them. 



Theobroma Cacao L. Stercullaceae Seed 0.05 to 0.36%. 



This species Is the principal commercial source of cocoa, chocolate, 

 etc. 



