Vlll 



LIST OF ILLUSTRATIONS. 



PAGE. 



BOTRYCHIUM MATRICARI/EFOLIUM TENEBROSUM .... 

 BRACKEN. Pteris aquilina. Lower pinna. ..... 71 



" KING CHARLES IN THE OAK." 73 



A FRUITING PINNA. 75 



PTERIS AQUILINA PSEUDOCAUDAT A. Lower pinna.. ... 76 



THE BRACKEN ROOTSTOCK. 7 8 



WINTER BRAKE. Pellaa atropurpurea. ... . 83 



WINTER BRAKE. PeU*a atropurpurea. . . . facing 84 



TIP OF FERTILE FROND. Enlarged. -. 86 



SLENDER CLIFF BRAKE. Pellaa gracilis. .... facing 86 



PELL/EA DENSA. Fertile frond 87 



RUSTY WOODSIA. H'oodsia Ilvensis. ...... 94 



ROOTSTOCK. 95 



FRUITING PINNA. ......... 96 



OBTUSE WOODSIA. Woodsia obtusa. ..... facing 98 



ALPINE WOODSIA. Woodsia hyperborea. . ..... 98 



A FRUITING FROND. 9 8 



OBTUSE WOODSIA. Woodsia obtusa. ..... facing 96 



FERTILE FROND. 99 



SMOOTH WOODSIA. Wfodsia glabella, ..... facing 100 



CHRISTMAS FERN. Polystichum acrostichoides. Fertile and sterile 



fronds. ........ facing 106 



POLYSTICHUM ACROSTICHOIDES INCISUM. 107 



HOLLY FERN- Polystichum lonchitis. .... . 108 



THE CHRISTMAS FERN. Polystichum acrostichoides. Plate III. . facing 108 



POLYSTICHUM BRAUNII. " 



CROSIERS "2 



MARSH FERN. Aspidium Thelypteris. ...... 118 



VENATION. "8 



THE MARSH FERN. " ALONG STREAMS AND IN DAMP MEADOWS. . facing 118 



SORI. "9 



THE SNUFF-BOX. 120 



NEW YORK FERN. Aspidium Noveboracense. .... facing 120' 



NEW YORK FERN. Aspidium Noveboracense. ..... 121 



FRUITING PINN/e. ........ . ' 122 



VENATION. .......... 125 



ASPIDIUM SIMULATUM. 124 



FRUITING PINNA. 125 



VENATION. ...... 126 



MARGINAL SHIELD FERN. Aspidium mar ginate. .... 134 



