ON THE PEVELOPMENT OF }I/\I;AMELIS VIKGINIANA L 



Introduct ion, 



This v/ork on Ilarnamolis was undortaken on >iccount 

 of its peculiar habit of flowerinc. It is one of the 

 few angiosperms whose flowers open in the fall, and 

 which inatures fi'uit the following year. This peculiar- 

 ity made it s^em worth while to investigate its entire 

 ernbryological history and especially the behavior of 

 the lollen tube, and the time and manner of fertiliza- 

 tion. 



The literat^^re of the family is not extensive, 

 and none of it has to do with the embryology of any of 

 its forms. The most complete working out of the anat- 

 omy and affinities is by Reinsch(12). Raillon{3) care- 

 fully described the organogeny of the flower in h'ama - 

 melis Vir.^iiniana and Fothergilla gardeni . Van Tieghem 

 (14) worked on the secretory canals of Liquidambar and 



