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 



XL 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 



