POLYPODIACE^E. 



Polypodium vulgare L. Polypody. Not rare, but 

 rather local in its distribution. Where it does occur, it is 

 likely to be abundant, although two stations are known to 

 the writer which contain fewer than fifty plants. 



Polypodium polypodiodes (L.) Gray Polypody. 

 Rare ; only two counties, Adams and Hamilton, in the 

 extreme southwestern corner of the State, are honored by 

 its presence. I have never collected it. 



Adiantum pedatum L. Maidenhair. The one fern 

 known by everybody everywhere, and it is as common as 

 it is well known. 



Pteris aouilina L. Brake or Bracken. Abundant in 

 northern Ohio, but rather rare in the south. It attains 

 great size compared with other Ohio ferns, and it is no 

 uncommon thing to find specimens over forty inches in 

 length and width. These specimens, however, would 

 seem diminutive by the side of those from Oregon, Maine, 

 or the Andes. The bracken is the subject of attack by 

 some parasite, so that good fruiting specimens are rather 

 difficult to obtain at all times. 



Pell^ea atropurpurea (L.) Purple Cliff-brake. Oc- 

 curs in profusion, but is local in its distribution. To see 

 it at its best, one must visit the Niagara Limestone ex- 

 posures in Highland, Green, Clark, and Miami Counties, 

 where it literally occurs by the mile and is numbered by 

 the tens of thousands. It is very rare in the north, be- 

 ing known at present only in Stark and Ottawa Counties. 



Woodwardia Virginica (L.) Virginia Chain Fern. 

 Occurs in and around some of the small lakes in Wil- 

 liams, Summit, Defiance, Wayne, and Ashtabula Counties, 

 all in the northern part of the State. It is not seen in 

 many private herbariums. 



Asplenitjm pinnatifidum Nutt. Pinnatifid Spleen- 

 wort. Not common ; it has been collected in Fairfield, 

 Hocking, Lawrence, and Logan Counties. 



