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



DiCKSONIA 



Hay-scented or Boulder Fern, Dicksonia punctilohula. 



Cystopteris 

 Bulb-bearing Cystopteris, Cystopteris bulbifera. 

 Fragile Cystopteris or Brittle Fern, Cystopteris JragiUs. 

 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 Novehoracensis. 

 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. 



