110 ASPIDIUM SPINULOSUM. 



A hardy deciduous Fern. 



Native of England. 



Fronds erect; bipinnate, narrow, and ovate-lanceolate; tlie 

 margins nearly parallel below, and glabrous. Pinnae numerous; 

 the lower ones distant and sub-opposite, the upper ones elon- 

 gate, alternate, triangular, and stalked, the stalk twisted so as 

 to make them stand nearly horizontal. Pinnules oblong, inciso- 

 pinnatifid, having serrate spinose mucronate lobes. 



Sori medial. Indusium entire on the margin. 



Stipes having broad, ovate, pale brown scales, crowded near 

 the base and more remote upwards. 



Terminal; adherent to a somewhat tufted rhizoma. 



Length of frond from twelve to thirty-six inches; colour pale 

 yellowish green. 



