ATHYRIUM FILIX-FCEMINA 115 

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Fig. 99. One of the percristate superbums. 
P. s. CRISPATUM, P. $. DISSECTUM, Р. S. FOLIOSUM, P. $. GRANDI- 
CEPS, P. $. KALON, Р. S. PERCRISTATUM.— Their special characters are 
indicated by these names; the last-named is by far the finest 
crested form extant, even the pinnulets being distinctly and evenly 
fanned at tips. 

