Portion of matuvo Frond—under side. 



GYMNOGEAMMA VILLOSA. Link. 



PLATE XI. 



Gijimi ogranime villom., 

 Anogramme villosa, 

 Leptogramma villosa, 



Grammitis villosa, 



Ktjnze. 



Fee. 



J. Smith. 



Moore amd Houlston. 



Pkesl. 



Gymnogramma — jSTakcd writing. 



Villosa — Shaggy, 



The present and the next species, by some of our principal 

 authors upon Ferns, have been separated from the Gymno- 

 grammaS; and placed together with a few others in a separate 

 genus called Leptogramma. Those classed as Leptogramma 

 differ from the Gymnogrammas from the circumstance that in 

 the Leptogramma the veins and sori are simple; the rhizoma 

 and the general habit of growth are unlike that of the 

 Gymnogrammas. In the elongated sori they resemble the genus 

 Grammitis. In the venation and general habit, there is a 

 striking similarity with some of the PolypocUums, but in the 

 sori they differ widely from this latter genus. On carefully 

 considering all the characters of these plants, it appears desirable 

 to retain the Lepiogrammas amongst the Gymnogrammas, in 

 preference to forming another genus, a plan which has been 

 adopted by Schlcchtcndal, Ivunze, etc. 



In Gymnogramma villosa the fronds arc two feet long; in 



