THE rOLYSTICHUMS 



209 



Fig. 238. P. ang. pluinosissimuni (Birkenhead). 



Plumosissimum (Fig. 238). — A most extraordinary development, 

 as our figure shows, raised by Mr. Birkenhead, the fronds re- 

 presenting dense masses of moss-like verdure, growth hardly seeming 

 to be able to cease ; the plant still exists, but requires extremely 

 favourable conditions to equal its portrait, preferring, as a rule, 

 to remain as a prettily divided flumosum. 



Polydactylum Wollaston. — Found Somerset ; pinnae small 

 crested, fronds heavily tasselled. 



