Part 2

Fertilization, Development, and Fructification of Ferns 32

Notable Fern Families 36

How to Use the Book 38

Guide 40

Fern Descriptions:

Group I 54

Group II 67

Group III 87

Group IV 105

Group V 120

Group VI 159

Index to Latin Names 211

Index to English Names 213

Index to Technical Terms 215

LIST OF PLATES

⁂ The actual sizes of ferns are not given in the illustrations. For this information see the corresponding description.

PLATE PAGE

I. SENSITIVE FERN, Onoclea sensibilis, 57

II. OSTRICH FERN, Onoclea Struthiopteris, 59

III. CINNAMON FERN, Osmunda cinnamomea, 61

IV. CURLY GRASS, Schizæa pusilla, 65

V. ROYAL FERN, Osmunda regalis, 69

VI. INTERRUPTED FERN, Osmunda Claytoniana, 73

VII. ADDER'S TONGUE, Ophioglossum vulgatum, 79

VIII. TERNATE GRAPE FERN, Botrychium ternatum, 83

IX. MOONWORT, Botrychium Lunaria, 85 LANCE-LEAVED GRAPE FERN, Botrychium lanceolatum, 85

X. PURPLE CLIFF BRAKE, Pellæa atropurpurea, 91

XI. NARROW-LEAVED SPLEENWORT, Asplenium angustifolium, 99