82 



POLYSTICIIUM AXGULARK. 



exceedingly irregular both in size and form. The fronds ai'e 

 proliferous, profusely scaly throughout, and the serratures very 

 conspicuously bristle-pointed. Fronds have been sent to me 

 by Mr. C. Monkman, of Malton, and Mr. Sim, of Foot's Cray. 



Fig. 49. 



TRtJNCATtM, Lowe. (Plate XVII. — A,)— A remarkable and 

 distinct variety, originally found in Ireland, but has since been 

 raised from spores in various ferneries. Its distinguishing features 

 are the truncated form of the fronds and pinnae. The frond 

 terminates abruptly. The pinnae are short, with from three to 

 four pairs of pinnules, terminating with a fan-shaped pinnule, 

 the remainder of the pinnules being palmately lobed and deeply 

 toothed. Veins ramose; venules simple or furcate. Sori sub- 

 medial, almost marginal. Length of frond from nine to eighteen 

 inches, breadth from two or three inches. Colour deep green 



