68 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



994 Aspleiiiiiiii JiILx-fccnii/ia, Hernh. Ames; Keokuk; Winnesheik 

 county; Emmet county; Delaware county; Muscatine county; Iowa 

 City; Charles City. The var. Michaiixii, Mett., in Polk and Story 

 counties. 



995 Caiuptosorus rhizophyllus^ Lk. Des Moines; Ackley ; Fort 

 Dodge; Delaware county; Iowa City; Decorah; Monticello; Musca- 

 tine county. 



996 Campiosonts rJiizophylhis, Lk., var. inteniicdiiis, Arthur. Mus- 

 catine county. 



997 Pile i:;opt c ri s }u\\a}^o)ioptera, Yin. Delaware county ; Muscatine 

 county; Iowa City. 



998 Phei:;opteris calcarea, Fe'e. Decorah. 



999 Aspidiiiin aciosticlwides, Swz. Muscatine county. 



1000 Aspidium Thelyptcris, Swz. Winnesheik county; Scott 

 county; Iowa City. 



1 00 1 Aspidium Goldiaiut/ii, Hook. Muscatine county. 



1002 Aspidii/in spiniilosHi/i, ?i\wz. Keokuk; Muscatine county. 



1003 Crs/opliT/s />/i//d/('rii, Bernh. Charles City; Winnesheik coun- 

 ty; Delaware county; Muscatine county; Iowa City. 



1004 Cystopieris fragilis, Bernh. Very common, as also the var. 

 dc/itata, Hook. 



1005 Onoclea sensibilis, ]-. Not uncommon from Charles City, 

 Ames, and Keokuk, eastward. 



1006 Onoclea Sfri/t/iiopteris, Hoftm. Throughout the eastern half 

 of the State as far south as Iowa City; also in Emmet county. 



1007 Woodsia obtusa, Torr. Johnson county; Delaware county; 

 Winnesheik county; Boone county; Muscatine county. 



1008 Osiiwnda Claytojiiana, \,. Charles City; Winnesheik county; 

 Ames; Iowa City. 



P>()UISETACE/E. 



1009 Egiiiselimi anw/ise, \ .. \^ery common. 



loio E(iiiisetiiiii Hiiiosiiiii,\.. Story county; Scott county; Emmet 

 county. 



10 1 1 Equisetitiii robustiiiii, A. Br. Keokuk; Clinton county. 



10 1 2 Kquisctiiiii ]iiei)iah\ L. C'ommon. 



10 1 3 /ujitiseiiii/i leeTigafmii, A. Br. Emmet county. 



The following descrijjtions are of species not given in Gray's "Man- 

 ual," 5th edition, nor in Underwood's "Our Native Ferns and their 

 AlHes:" 



