THE 



COMMON 



HART'S TONGUE 



FERN. 



Scolopendrium vulgare.* SMITH 



Scolopendrium forms a sub-group of the Aspleniece, 

 in which the sori, instead of being simple and distinct, 

 are brought together in opposite pairs, so that what 

 appears to be a line of spore-cases forming a sorus is in 

 fact a double line forming a double or twin sorus. 

 The name Scolopendrium is from Scolopendra, a centi- 

 pede, from some supposed resemblance between the 



* Asplenium Scolopendrium (lAnnaus), Blechnum linguifolium, 



