ILLUSTRATIONS 



Plate Page 



Marginal Shield Fern Frontispiece 



Wall-Rue I 31 



Maidenhair .... II, III 41 



Hart's-Tongue ... IV 47 



Polypody V, VI, VII 55 



Purple Cliff-Brake . VIII, IX, X, XI 61 



Narrow-Leaved Spleen- 

 wort XII, XIII, XIV 69 



Maidenhair Spleenwort XV .... 75 



Ebony Spleenwort . XVI, XVII 83 



Christmas Fern . . XVIII, XIX, XX 91 



Slender Cliff -Brake XXI, XXII 97 



Silvery Spleenwort . XXIII, XXIV, XXV 107 



New York Fern . . . XXVI, XXVII iii 



Massachusetts Fern . XXVIII, XXIX, XXX 117 



Marginal Shield Fern XXXI, XXXII 123 



Spinulose Fern . . . XXXIII, XXXIV, XXXV . . . .129 



Walking Leaf . . . XXXVI 135 



Narrow-Leaved Chain 



Fern XXXVII, XXXVIII, XXIX, XL, XLI 143 



Sensitive Fern . . . XLII, XLIII, XLIV, XLV . . . .153 



