PLATE X. 
1 . FORKED SPLEENWORT ( Asplenium septentrionale). 
See Page 69. 
2 . MOONWORT (Botrychium lunaria). See Page 71. 
3 . BRITTLE BLADDER FERN ( Cystopteris fragilis). 
See Page 73. 
4. MOUNTAIN BLADDER FERN {Cystopteris montana). 
See Page 75. 
