ILLUSTRATIONS xi 



PAGE 



Rusty Woodsia (a) 143 



Rusty Woodsia (b) 145 



Obtuse Woodsia 147 



Alpine Woodsia 149 



Smooth Woodsia 151 



Walkin/g Fern (a) 155 



Walking Fern (b) 157 



Hay-Scented Fern 159 



Cloak Fern 161 



Hart's Tongue 163 



Common Bladder Fern (a) 165 



Common, Bladder Fern (b) 167 



Bulbiferous Bladder Fern (a) 169 



BuLBiFEROus Bladder Fern (b) 170 



Curly Grass 173 



Climbing Fern 175 



Filmy Fern 179 



Adder's Tongue 183 



Lance-Leaved Grape Fern 187 



Matricary Grape Fern 189 



Little Grape Fern 191 



Common Grape Fern 193 



Dissected Grape Fern 195 



Rattlesnake Fern 197 



Moonwort 199 



