600 



THE BOOK OF CHOICE FERNS. 



The sori (spore masses), disposed in a single row about half-way between 

 the mid vein and the margin, are covered by a nearly round involucre of a 

 fugacious nature. — Lowe., Ferns British and Exotic, vii., p. 46. 



This variety thrives best when planted in rockwork, in either a warm 

 or an intermediate temperature. 



NIPHOBOLUS— Niph-ob -ol-us. See Polypodium. 

 NIPHOPSIS— Niph-op'-sis. See Polypodium. 



