22 COISfNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Dryopteris acrostic hoides Kuntze, var. Schweinitzii Underw., 

 occurs occasionally. It is found more often late in the season 

 and frequently where the woods have recently been felled. A 

 form with crested fronds occurs at East Haddam (Weath- 

 erby). 



ASPIDIUM Sw. Wood Fern. Shield Fern. 

 Aspidium Thelypteris (L.) Sw. (female fern). 

 Dryopteris Thelypteris Gray. 

 Marsh Fern. 



Common. Swamps and wet ground. Aug. 



Often very plentiful and sometimes cut and dried as bed- 

 ding for stock. 



Aspidium simulatum Davenp. (imitating; referring to its re- 

 semblance to the Marsh Fern) . 



Dryopteris simulata Davenp. 



Massachusetts Fern. 



Wet woods and cedar swamps. Rare over most of the 



state: Salisbury (Mrs. C. S. Phelps), Oxford (Harger), 



Southington (Bissell), Cromwell (H. C. Bigelow). Local 



in New London County (Graves). Aug. 



Aspidium noveboracense (L.) Sw. (New York). 

 Dryopteris novehoracensis Gray. 

 New York Fern. 



Frequent. Woods, more often in moist ground. Aug. 



Aspidium marginale (L.) Sw. (on the edge; referring to the 



position of the fruit dots). 

 Dryopteris marginalis Gray. 

 Marginal Shield Fern. 



Frequent. Dry rocky woods. July. 



The rhizome is officinal and with that of the Male Fern 

 furnishes the drug Aspidium or Filix-mas. All species of the 

 genus possess the same property in some degree. 



Aspidium Goldianum Hook. 

 Dryopteris Goldiana Gray. 

 Goldie's Fern. 



Rare. Rich moist woods: North Branford (O. Harger), 

 Bloomfield (Miss A. Lorenz), Farmington (L Holcomb), 



