RUTACEAE. ^ PONCIRUS 151 



In view of these numerous and, from a taxonomic point of view, important 

 points of difference, there can be no doubt but that the trifoHate orange must be 

 removed from the genus Citrus. The oldest name for it seems to be the Poncirus 

 of Rafinesque. 



A picture of this tree will be found under No. 0360 of the collection of Wilson's 

 photographs. 



