74 



THE FERN BULLETIN 



Cystopteris fragilis (L.) Fragile Bladder-fern. 

 Moist, shaded rocks and in woods. Common through- 

 out. Very variable. 



Dicksonia pilosiuscula Willd. Boulder Fern. 

 In woods, on hillsides and in fields. "During haying 

 season, whole counties in eastern Pennsylvania are 

 thoroughly perfumed by the fronds cut with the hay." 

 (Clute, "Our Ferns.") My own observations do not 

 seem to confirm this statement. A few years ago I 

 came across two colonies of the species growing on the 

 brink of a small quarry a few paces apart. The fronds 

 of one were without exception, normal while of the 

 other colony all bore numerous forked pinnae. (Not 

 var. cristata Maxon). The apices we're normal. 



Nephrodium cristatum (L.) Crested-fern. 

 Swamps and wet thickets. Common throughout. 



Nephrodium cristatum Clintonianum. (D. C. 

 Eaton). Clinton's fern. Wet thickets and woods. 

 Rather rare. Susquehanna, Northampton, Delaware, 

 Chester, Erie and Lancaster counties. The type does 

 not occur with several colonies known to the writer. 



Nephrodium cristatum x Goldieanum. (Bene- 

 dict.) Rare, known only from type station in Dela- 

 ware county, where it was collected by the writer in 

 deeply shaded wet gully. Neither alleged parent oc- 

 curs within several miles, at least numerous searches 

 have failed to disclose them. 



Nephrodium cristatum x marginale. (Daven- 

 port.) Wet thickets. Rare. Collected by writer in 

 Delaware county and in Lehigh by Mr. Hamm. 



Nephrodium cristatum x spinulosum inter- 

 medium. (Dowell.) Wet thickets. Rather rare. 

 Pike, Montgomery. Susquehanna, Berks, Philadelphia, 

 Somerset, Alleghenny, Erie, Clinton, Delaware, Le- 



