£8 



THE FERX BULLETIN 



been used as a skeleton, adding to it recent records 

 and those omitted from that list and known to be 

 authentic. Herbaria have been freely consulted, espe- 

 cially those of the Academy of Natural Sciences of 

 Philadelphia, The Philadelphia Botanical Club, and 

 Mr. Witmer Stone, all of which are rich in material 

 from the eastern section of the State. Much valuable 

 data from the western portion was contributed by Mr. 

 Otto E. Jennings of the Carnegie Museum based upon 

 specimens in the herbarium of that institution. I am 

 especially indebted to the late Alvah A. Eaton for notes 

 on the occurrence of the genera Isoetes and Equisetum 

 in this State. My thanks are also due Mr. Harry D. 

 Bailey of Lafayette College, Prof. Otto Hatry, Mr. C. 

 L. Gruber, Mr. Daniel W. Hamm and Mr. W. C. Bar- 

 bour, who have sent me local notes and specimens and 

 in other ways aided me in the preparation of this list. 



OPHIOGLOSSACEAE 



Ophioglossum vulgatum L. Adder's Tongue. 

 Wet meadows and swamps. Local. Allegheny, Brad- 

 ford, Bucks, Chester, Crawford, Delaware, Berks, Lan- 

 caster, Monroe, Mifflin, Luzerne, Wayne and Tioga 

 counties. To be expected throughout in suitable situ- 

 ations. Interesting ecological forms occur. 



Botrychium dissectum Spreng. Dissected Grape- 

 fern. Woods and thickets. Infrequent throughout, 

 more common in the mountains. Grows with and 

 occasionally grades toward B. obliquum. Plants with 

 double and forked fertile and sterile portions not un- 

 common. 



Botrychium obliquum Muhl. Common Grape- 

 fern. Woods and thickets. With B. dissectum, 

 though more common. Similar monstrosities occur, 



