PLATE OOXXIII. 



a and b are a doable lemon -which I got off a tree in Etawah. It was quite seedless. 



e and d are another double lemon, which I got at an English shop. It came from Palermo, and 

 had seeds. 



These double lemons were formed by a fusion, o" fasciation of two ovaries. In d 

 the centres of the two lemons are quite separate. In b, however, there is a tendency 

 to fusion of the centres, in order to produce an elongated common centre. 



NOTE. It is not improbable that the large varieties of citrus may have originated either 

 by proliferation of extra carpels between the normal ones, or, as !n this case, by a fusion of two 

 ovaries. I have examined three double lemons, and in no case did the rind extend inwards between 

 the two lemon pulps. 



With reference to double fruit, vide Appendix 21, on the Indian Philippine. 



