356 Appendix. 



we have only to suppose that in the cases of apparently mixed 

 fruits, some of the vessels nourishing the warty parts may 

 have been of larger calibre (a variation that might sometimes 

 happen), . and thus would give rise to more luxuriance and 

 consequent wartiness in those strips. Then one cannot have 

 much difficulty in concluding that a change in the rind might 

 give rise to some change in the corresponding or adjacent 

 carpels of the pulp, and so also induce a change in their 

 colour and flavour, for we no more know what produces 

 sweetness or sourness in the citrus, than we know what pro- 

 duces colour. No doubt these characters may be inherited, 

 but the variations are infinite. 



For my part, taking the view that both rind and pulp 

 carpels are modifications of branches, I think that these mix- 

 tures in one fruit of the citrus may possibly be explained by 

 simple bud-variation, without any direct influence of either 

 pollen or graft, whatever the cause of this bud variation may be. 



No. 66. 



It appears that in India the word creese means a weapon, 

 and therefore may be the same as krissen of the Malays, 

 which Rumphius mentions in his chapters on the Citrus. 

 The Saturday Review of 2Oth August, 1887, in a review of 

 the Royal Jubilee Exhibition at Liverpool, says, with regard 

 to the collection of arms, that " it ranges from the tiny Indian 

 'creese' to the loo-ton gun." This word creese appears to 

 be another, which is common to both India and the Malay 

 archipelago. 



No. 67. 



The following catalogue was courteously brought to my 

 notice by Dr. Trimen, Director of the Royal Botanic Garden 

 of Peradeniya, Ceylon. 



" Catalogus Plantarum in Horto Botanico Bogoriensi cul- 

 tarum alter" (Batavia 1844), by Justus Karel Hasskarl. 



I have extracted from it the following list of citrus plants, 

 p. 216: 



