10 OSMUNDA GRACILIS. 



inches; length of pinnules three inches, width three-quarters 

 of an inch. 



The frond is fertile at the apex for the upper six inches. 



In 0. Regalis the base of the pinnules is not rounded, and 

 the footstalk is not so apparent. The plant is much larger, 

 and has many more pinnae, usually four times as many, and 

 these are placed close together, but the pinnules are smaller. 

 The rachis, stipes, and fertile portion, are very much more 

 slender in 0. gracilis, and its forked veins less prominent. 



Fronds ascending. 



For plants of this species my thanks are due to the late 

 Mr. Large, of New York, and to Mr. Sim, of Foot's Cray. 



It may be procured of Messrs. Sim, of Foot's Cray; E. G. 

 Henderson, of St. John's Wood; Rollisson, of Tooting; Kennedy, 

 of Covent Garden; Booth, of Hamburg; and Cooling, of Derby. 



The illustration is from a plant in my own collection. 



