ii8 FERN GROWING 



raised, yet some have a stroncrer constitution, and are more 



Fiq. s^. — C'orii. Half size. 



pronounced in their characters ; two of them are fig-ured, viz 



Fig. 54.— .\7/;<z. Halfsi/e. 



Cora (Fig. 53), having the characters of all the four 



