ox THE ANATOMY OF MAGXOLIACEyE. ^49 



are so related in tlieir external eliaracters that there are not wanting- 

 cases in wliich some species of one of the three genera is often ])laced 

 in either of the other two. J If we except the case of sncli closely 

 related «genera, it is probahly the rule that any two genera of the same 

 tribe or family present anatomic:d eliaracters of such difference as to 

 distinguish them from each other. 



If it is difficult in some cases to distinguish certain genera of 

 the same tribe or family from one another by anatomical characters 

 alone, much more would it be so to distinguish in this way species 

 included in the same genus. Such is actually the case in the ])resent 

 family, and so it w<Mdd perhaps be in other families. 



I Tvish to express here my obligations to Professor Edward 

 Divers for his kindness in looking through the present article and in 

 suggesting many improvements in Eiiglisli. 



X Thus, ^lafinolia ]nt)iiilii, Andr., JAriodciidron coco. Lour, and Urindeiidnm lilifcra, Liun, 

 are synonymous; a\so MicJu'lia fu'^cata, B\\\u\e, Magnolia fm^cata, Audi:, and Liriodciulnni F'kjo, 

 D. C, are synonymous — The Journal of the Linnean Societij, Vol. XXIII, Xo. 150. 



