IOWA PTERIDOPHYTA. 167 



(T. H. Macbride. Aug., 1895, mature fruit); Delaware 

 (J. E. Cameron, Nov., 1897, with mature fruit); 

 Winneshiek (T. E. Savage, May, 1899, with old fruit) . 



Genus C R Y P T O G R A M M A R. Br., "Ex. App. 

 Frankl. Nam, p. 767 (1823). 



Cryptogramma stelleri {Gmel.) Prantl, 



On sandstone or limestone rocks, in less exposed situa- 

 tions than the preceding species. It begins to fruit in 

 May and June. All the specimens show more or less fruit, 

 those collected in May and some of those in June, being 

 immature. The following counties are represented: 

 Johnson {Dr. C. M. Hobby, June, 1880); Cedar (T. H. 

 Macbride, July, 1893) ; Delaware (T. H. Macbride, Aug., 

 1883); Jackson (Aug., 1894); Dubuque (E. M.Irish, 

 May, 1891; J. A. Anderson, July, 1900); Winneshiek 

 (T. E. Savage, May, 1899); Cerro Gordo (July, 1896). 



Genus CHEIUNTHES Swartz, Syn. Fil., p. 129, 



(1806). 



Cheilanthes FEEi Moore. 



Cheilanthes iannginosa Nutt. 



Quite rare, on rocky ledges. The specimens in the 

 herbarium are all well-fruited. They are from the follow- 

 ing counties: Jones (T. H. Macbride, Aug., 1895); 

 Dubuque {Pan! Bartsch, July, 1895); Allamakee {T. E. 



Savage, May, 1899). 



Family ADIANTE5I J. Smith, Hist. Fil., p. 273, (1875). 



Genus ADIANTUM L., Sp. PL, vol. II, p. 1094 



(1753). 



Adiantum pedatum L. 



This species rivals Athyrinm filix-foemina in abundance 



