66 GYMlSrOGRAMMA LEPTOPHYLLA, 



west than any portion of England, but that they are situated 

 within a very few miles of the French coast. 



The fronds are glabrous and fragile, few in number, usually 

 only two or three; erect in habit, oblong-ovate in form, and 

 bi-trip innate ; the pinnse are alternate, and ovate-triangular in 

 shape, the pinnules being also alternate, and cuneate at their 

 base, three-lobed, their apices being bluntly bidentate. 



Length of frond from three to eight inches. Colour a pale 

 yellowish green. 



Veins dichotomously branched. The fructification covers 

 the whole of the under side of the frond. Sori linear and 

 forked, being situated along the ultimate veinlets, eventually 

 confluent. The spore-cases are abundant. 



The stipes usually longer than the fronds, smooth and shining, 

 and of a rich brown colour at the base; terminal and adherent. 



Caudex minute and sub-globose, mostly annual, sometimes 

 bi-annual. 



Besides the ordinary fronds there are several small somewhat 

 fan-shaped fronds, and others pinnate with fan-shaped pinnae, 

 the latter fronds only two inches in length; the lobes vary in 

 being larger and more expanded, ^nd in being mostly barren. 



There are no varieties of this species. 



