THE STUDY OE THE EVOLUTIOJ^ OF THE FLOWEE 



249 



Text-fiff. 1. 



Ai 



A4. 



in ser 



Pl. 



mi mz 



B3 



in ser 



out ser 



Diagrams illustrating the course of tlie floral vascular tissue in four genera of the Hamamelidaceoc : 

 Al, ITamamelis arhorea ', A 2-A 4, H. Zuccarlniana ; B1-B3, Foihcrgilla major; CI, C 2, Pan-otla 



Jacquemontiana ; D1-D3, Coryloims spicata. (Abbreviations, see p. 308,) 



2p 2 



