BRAZIL NUT TREE IN CEYLON. 431 



On the whole, though conclusions based on a single tree can 

 scarcely be regarded as valid, it would appear that this 

 Peradeniya tree affords strong ground for the suggestion that 

 there is, after all, only one species of Bertholletia. It will be 

 seen from the figure that a very slight modification would 

 convert its opercular opening into one which would allow the 

 operculum to fall out, and it would seem probable that this 

 feature is variable. 



References. 



Miers, J. — On the Lecythidaceae. Trans. Linn. Soc, XXX., 

 pp. 157-318. 



Young, W. J. — The Brazil Nut. Botanical Gazette, LII., 

 pp. 226-231. 



