NOTES ON THE FLORA OF IOWA. 



213 



Trillium nivale Rid. 



Henry Co. {^AliUs) ; Chickasaw Co. [Jf/ss Hoiue') ; Linn 

 and Johnson Cos. Common. A form with pink-veined 

 petals is common near Iowa City. 

 Melanthium virginicum L. 



Lee and Johnson Cos. Formerly rather common in John- 

 son Co., but now very rare. 



PTERIDOPHYTA. 



Equisetum arvense L. 



Emmet Co. [Cralty); Henry Co. {^M/Ih) ; Lee, Johnson, 

 Linn and Winnebago Cos. 

 Equisetum limosum L. 



Emmet Co. {^Cratty^ ; Delaware Co. [Macbride) ; Hamil- 

 ton Co. 

 Equisetum hyemale L. 



Lee, Johnson, Linn and Winnebago Cos. 

 Equisetum l^evigatum Braiui. 



Emmet Co. {^Cratty); Shelby Co. (yFitzpatrick') ; Page Co. 



POLYPODIUM VULGARE L. 



Allamakee, Muscatine and Clayton Cos. [j\lacbride ) 

 Pteris aquilina L. 



Johnson Co. 

 Adiantum pedatum L. 



Jones and Allamakee Cos. (y^/rzc/^r/V/^:) ,• Emmet Co.( Cratty) ; 

 Shelby Co. [Filzpatrick) ; Calhoun Co. [Rigg) ; Polk 

 Co. {^R. Des ]\Ioi)ies H. S.'); Lee and Johnson Cos. 

 Pell^a gracilis Hook. 



Cedar and Delaware Cos. [Macbride) ; Dubuque Co. (7^. 

 M. /r/5//) ; Johnson Co. {Dr. C. M. Hobby ); ^o^xv&on 

 and Jackson Cos. This species was collected in Scott 

 Co. by Dr. Parry in i860, but has not been found there 

 since. 

 Pell^ea atropurpurea Link. 



Jones Co. [Macbridc) ; Johnson Co. Common. 



