List of Illustrations. 



THE OAK FERN. 



Phegopteris Dryopteris. 



A CROSIER. 



FLOWERING FERN. ...... 



SORI OF ASPLENIUM. 



SORI OF POLYPODIUM. 



"FIDDLE-HEADS" 



A WAYSIDE SPRING. . 



CINNAMON FERN. Osmunda cinnamomea. 



A FRUITING PINNA. ....... 



TUFT OF WOOL AT BASE OF PINN/E, .... 



THE CINNAMON FERN. Osmunda cinnamomea. 

 INTERRUPTED FERN- Osmunda Claytoniana. . 

 INTERRUPTED FERN. Osmunda Claytoniana. Fertile frond 

 THE INTERRUPTED FERN. Osmunda Claytoniana. . 

 FLOWERING FERN. Osmunda regalis. .... 



SPORE-CASES. ....... 



CROSIERS. 



FLOWERING FERN. Osmunda regalis 



SPORANGIA. 



RATTLESNAKE FERN. Botrychium Virginianum. . 

 RATTLESNAKE FERN. Botrychium Virginianum. 

 ADDER'S-TONGUE. Ophloglossum vulgatum. . 

 THE ADDER'S TONGUE. Ophioglossum vulgatum. -Plate I. 



"THERE is AN HERB " . . . 



MOONWORT. Botrychium Lunaria. .... 

 COMMON GRAPE FERN. Botrychium obliquum. 

 BOTRYCHIUM OBLIQUUM DISSECTUM .... 

 LITTLE GRAPE FERN. Botrychium simplex. 

 LANCE-LEAVED GRAPE FERN. Botrychium lanceolatum. 

 THE MATRICARY GRAPE FERN. Botrychium matricariafolium. 

 MATRICARY GRAPE FERN. Botrychium matricaricefolium. . 



Frontispiece. 



PAGE. 



12 



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3i 



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58 

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Plate II facing 60 

 61 



