162 NATURAL HISTORY BULLETIN. 



mature fruit). Fruiting specimens may be found from 

 June until October. 



Phegopteris dryopteris (L.) Fee. 



Rare in Iowa. Two specimens from Johnson county, 

 probably collected by Prof. Macbride, are in the collection. 

 They are well-fruited. The species was formerly occasion- 

 ally found in deep woods north of Iowa City. 



Phegopteris robertiana (Hoffm.) Fee. 



Probably a mere variety of the preceding. Not common 

 in Iowa. One county only is represented: Allamakee 

 {T. H. Macbride, Aug., 1893, in full fruit.) 



Genus NEPHRODIUM Richard {?)* inMichaux, 

 Flor. Bor. Am., vol. II, p. 266. (1803). 



Nephrodium thelypteris (L.) Desv. 



Quite common in wet meadows and ravines. Usually 

 fruiting in July and August. The following counties are 

 represented: Johnson (July, 1881, and August, 1893, 

 both fruiting); Delaware (T. H. Macbride, Aug., 1883, in 

 full fruit) ; Cerro Gordo (July, 1896, sterile) ; Hancock 

 (July, 1896, sterile). 



Nephrodium cristatum (L.) Mx. 



Two specimens, one in fine fruit, were furnished by Mr. 

 Fred. Reppert, who collected them in July, 1894, in Bloom- 

 ington township, Muscatine county, in "damp ravines, 

 etc." No other Iowa specimens are in the herbarium. 



Nephrodium goldieanum {Hk.) H. & G. 



This handsome species has been received only from the 

 eastern part of the State, where it grows in a number of 

 localities on well-shaded banks, etc. It begins to fruit in 

 August, and fertile fronds may be found until late in 

 October. The herbarium contains specimens from the 



* Richard's name does not appear in Michaux. 



