PAGE The Bristle Fern 34 The Tunbridge Filmy Fern 36 The Bracken Fern 39 The Maidenhair Fern 42 The Maidenhair Fern (Enlarged view of Back of Frond) 43 The Male Fern 47 The Mountain Buckler Fern 51 The Mountain Buckler Fern (Enlarged) 52 _Nephrodium dilatatum_ 54 The Holly Fern 58 The Oblong Woodsia 62 The Brittle Bladder Fern 64 _Athyrium filix-fæmina_ 67 The Rue-leaved Spleenwort 71 The Rue-leaved Spleenwort (Enlarged Back of Frond) 72 The Sea Spleenwort 76 The Maidenhair Spleenwort 79 The Green Spleenwort 81 The Hartstongue 82 The Sori on the Back of a Hartstongue Frond 83 The Common Polypody 87 Enlargement of the Sori on the Frond of Common Polypody 88 The Beech Fern 89 The Royal Fern 94 The Adder’s Tongue 97 The Moonwort 99 The Common Club Moss 102 The Fir Club Moss 104 The Quillwort 108 _Azolla caroliniana_ 110 Barren Stem of _Equisetum arvense_ 113 Fertile Cones of _Equisetum maximum_ 115 The Dutch Rush 120 HOW TO KNOW THE FERNS CHAPTER I THE FERNS AND THEIR ALLIES