IOWA ACADEMY OF SCIENCES. 203 



fragmentary data is about 25 inches, and is usually so 

 distributed as to be sufficient for a£?ricultural operations, 

 though in some seasons vegetation suffers from hot, south- 

 west winds. 



The synonomy adopted in the following catalogue is that 

 of the fllusfraied Flora, with such emendations as more 

 recent publications make necessary. The names used in 

 Graifs Manual, sixth edition, and the Illustrated Flora 

 when different from those adopted in this list, are printed 

 in parentlieses. 



The author takes pleasure in acknowledging valuable 

 assistance in studying our native flora from numerous 

 specialists in this and other states. Among those in our 

 own state, whose aid has been freely given, are Prof. Thos. 

 H. Macbride and Prof. B. Shimek of the Iowa State Uni- 

 versity; Prof. L. H. Pammel of the Iowa State College at 

 Ames, and Prof. T. J. Fitzpatrickof Estherville,all of whom 

 have published valuable papers treating, different phases of 

 the Iowa flora. 



PTERIDOPHYTA. 



polypodiace.^. 

 Onoclea L. 



1. 0. senslh/lis L. Sensitive Fern. Rare in woods^ 



Estherville; also introduced in an artificial grove 

 in Armstrong Grove township. 



2. 0. struthiopteris (L.) Hoft'. Ostrich Fern. Infre- 



quent, Estherville and Armstrong Grove town- 

 ships. 

 Cystopteris Bernh. 



3. ('. frar/ilis (L.) Bernh. Rare in woods throughout. 



ASPLENIUM L. 



4. .4. fj'li.r-fo'HNna (L.) Bernh. Lady Fern. Woods, 



and occasionally in artificial groves; our most 

 common species. 

 Adiantum L. 



5. A. liedatum L. Maiden-hair Fern. Woods along 

 West Fork of the Des Moines. 



