116 



ASPIDIUM FILIX-MAS, Vae. Willisokii. 

 Lowe. 



PLATE XLVIII. — B. 



Lastrea filix-mas, var. Willisonii, Staksfieid, MS. 



Aspidinm — Shield-Fern. Fih'x-mas — Male Fern. Willisonii — ISTamed 



after Mr. Willison, the discoverer. 



In the Section Lastrea of Authors. 



This singular variety of the British Male Fern was discovered, 

 in 1859, near Whitby, Yorkshire, by Mr. Willison. 



The fronds are narrow and attenuated, the pinnas are also 

 narrow and prolonged. Pinnules short, somewhat eroded, and 

 decurrent. 



Length of frond from twelve to twenty-four inches. 



My thanks are due to J\L-. C. Monkman, of Malton, for a 

 frond of this variety. 



