THE FERN BULLETIN 



11 



case of the latter, a vein is given off from the surface 

 of the pinnule and terminates in a sort of -green trian- 

 gle upon which the sporangium is borne. It will be 

 noted in the illustration, which shows parts of the pin- 

 nae variously magnified, that the parts of the margin 

 which bear sporangia are inclined to be triangular in 

 shape. Incidentally it may be observed that the mar- 



gins of the pinnules* are variously lobed and this may 

 possibly throw some light upon the origin of dissected 

 pinnules in other forms. The present specimens were 

 received through the kindness of Messrs. James 

 Shepard and H. C. Bigelow of Xew Britain, Conn. 



Some four years ago, Mr. D. Lewis Dutton found in 

 a cedar swamp near Leicester, Yt., several plants of a 

 curious form of the cinnamon fern having very narrow 



OSMUN'DA CINNAMOMEA F. AUGUSTA. 



fronds and pinnae with rather sharp-ended pinnules 

 that give it a remarkable resemblance to Nephrodium 

 unitum glabrun at first glance. The plants have since 

 retained their peculiar characteristics and it is quite 

 likely that the same form will be located in other 



