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GrifT., T. sinensis Sims., Kola acmiiiiiala llorsf. cl Meun. and Tiieobronia 

 Cacao L. ^). 



a. Roots : 



In Tlica s|). ~) Cofïea s)). and Tiieobronia neither the roots of the 

 liili gmwn plants, nor those of the seedlings showed traces of cafïcine 

 or tiieobromine. In Kola acuminata the roots of the fnll grown 

 specimens did not show any either; those of the seedlings, however, 

 contained theobromine but no caifeine. 



b. Stemö- : 



1. Extending young shoots contained : 

 caffeine in Tliea sp. and Coffea sp. 

 caifeine and theobromine in Kola acuminata, 

 theobromine no caffeine in Theobroma Cacao. 



2. One year old branches contained : 



caffehie in T. assamica, T. sinensis, Coffea liberica, C. arabica ; 

 no caffeine or theobromine in Coffea stenoi)liylIa, Theobroma Cacao, 

 Kola acuminata. 



3. Two years old branches contained : 



caffeine in T. assamica, T. sinensis, Coffea arabica, none in any 

 of the others ^). 



In branches, these xanthine derivatives are always found in the 

 bark and not in the wood, at least if the branches are old enough 

 to render possible a neat separation of the two. 



c. Leai'e.i ; 



1. young leaves of Tliea sp. and Coffea sp. contained caffeine, 

 those of Theoln-oma Cacao and Kola acuminata thcoliromine and 

 caifeine. 



2. Full grown lea\es of Thea sp., Coffea arabica and Coffea 

 liberica contained caffeine; those of Theobroma (*acao traces of 

 theobromine. Those of Coffea stcnophylla contained no caffeine, those 

 of Kola acuminata neither theobromine nor caffeine. 



d. Flowers: 



Thea assamica: caffeine in all parts of the flowers, calyx, petals, 

 stamens and pistil. 



Coffea liberica: caifeine in the pistil only. 



Theobroma Cacao: theobromine (no caffeine) in the [listil only. 



1) Coffea bcngalonsis Roxh. Gainellca japonica L., C. Sasangua Tlib. aiul 

 C minahassae Koordeis wcic also tested but in neither of them any caifeine was 

 found. 



-) These species aio only Ihose mcnlioned above antl nol those in note 1. 



■') The bark of very thick old branches of Thea assamica contains caffeine; 

 none is found in that of Thea sinensis. 



14* 



