256 NATURE-STUDY REVIEW [16:6— Sept., 1920 



DlCKSONIA 



Hay-scented or Boulder Fern, Dicksonia punctilobula. 



Cystopteris 

 Bulb-bearing Cystopteris, Cystopteris bulbifera. 

 Fragile Cystopteris or Brittle Fern, Cystopteris Jragilis. 

 Mountain Cystopteris, Cystopteris montana. 



POLYSTICHUM 



(Called by some botanists Aspidium or Dryopteris) 

 Christmas Fern, Polystichum acrostichoides. 

 Holly Fern, Polystichum Lonchitis. 

 Braun's Holly Fern, Polystichum Braunii. 



Dryopteris or Aspidium . 



New York Fern, Dryopteris or Aspidium Noveboracensis. 

 Marsh Shield-Fern, Dryopteris or Aspidium Thelypteris. 

 Massachusetts Shield-Fern, Dryopteris or Aspidium simulata. 

 Fragrant Shield-Fern, Dryopteris or Aspidium fragrans. 

 Crested Shield-Fern, Dryopteris or Aspidium Cristata, 

 Goldies Fern, Dryopteris or Aspidium Goldieana. 

 Evergreen or Marginal Wood-Fern, Dryopteris or Aspidium 

 marginalis. 



Male Fern, Dryopteris or Aspidium Felix-Mas. 

 Spinulose Wood-Fern, Dryopteris or Aspidium spinulosa. 

 Boott's Shield-Fern, Dryopteris or Aspidium Boottii. 



Phegopteris 



Long-Beech Fern, Phegopteris phegopteris. 

 Broad Beech-Fern, Phegopteris hexagonoptera. 

 Oak Fern, Phegopteris Dryopteris. 



Woodwardia 

 Virginia Chain-Fern, Woodwardia Virginica. 

 Net-vein Chain-Fern, Woodwardia areolata. 



SCOLOPENDRIUM 



Hart's Tongue, Scolopendrium scolopendrium. 



