CONTENTS 



Chapter Page 



Preface iii 



I. Development of the Fern Leaf i 



II. Wall-Rue 27 



III. Maidenhair 33 



IV. Hart's-Tongue 43 



V. Polypody 49 



VI. Purple Cliff-Brake 57 



VII. Narrow-Leaved Spleenwort 63 



VIII. Maidenhair Spleenwort 71 



IX. Ebony Spleenwort 77 



X. Christmas Fern 85 



XI. Slender Cliff-Brake 93 



XII. Silvery Spleenwort . 99 



XIII. New York Fern . 109 



XIV. Massachusetts Fern 113 



XV. Marginal Shield Fern 119 



XVI. Spinulose Fern .... 125 



XVII. Walking Leaf 131 



XVIII. Narrow-Leaved Chain Fern 137 



XIX. Sensitive Fern 145 



