DIVISION I. PTERIDOPHYTA 



(Ferns and Fern Allies) 

 POLYPODIACEAE (Fern Family) 



POLYPODIUM L. (Polypody) 



1 P. VULGARE L. (Polypody.) Common on rocks. 



2 P. VULGARE L., VAR. cRiSTATUM Moore. Susquchanna. Rare. 



PHEGOPTERIS Fee. (Beech Fern) 



3 P. POLYPODioiDES Fee. (Long Beech Fern.) Frequent in Abingtons. 



4 P. HEXAGONOPTERA Fee. (Broad Beech Fern.) Elk Mountain, Spring 



Brook. West Mountain near Continental mine, Mrs. William 

 Thornton. 



5 P. DRYOPTERis Fee. (Oak Fern.) Gravel Pond, Lily Lake. 



ADIANTUM L. (Maidenhair) 



6 A. PEDATUM L. Frequent. 



PTERIS L. (Brake or Bracken) 



7 P. AQUiLiNA L. (Common Brake.) Common. 



8 P. AQUILINA, VAR. PSEUDOCAUDATA Qutc. Spring Brook. 



PELLAEA Link. (CliflF Brake) 



9 P. ATROPURPUREA Link. Campbell's Ledge, cliff near Laurel Run 



Station. 



CRYPTOGRAMMA R. Br. (Rock Brake) 



10 C. STELLERi Prantl. Paupack gorge near Hawley, Dr. L. W. Ross. 



WOODWARDIA Sm. (Chain Fern) 



11 W. viRGiNicA Sm. Susquehanna, /. A. Graves. Rare. 



ASPLENIUM L. (Spleenwort) 



12 A. TRicHOMANES L, Frequent on rocks. 



13 A. PLATYNEURON Oakcs. Frequcut. 



14 A. PLATYNEURON, VAR. SERRATUM Miller. Tunkhannock. 



15 A. MONTANUM Willd. Bald Mount cliff. Rare. 



16 A. ANGUSTiFOLiuM Michx. Davidson's farm in Greenfield Township. 



Mrs. Davidson. This is the only station known within our 

 limits. 



17 A. ACROSTicHOiDES Sw. Spring Brook, Davidson farm, Greenfield 



township. 

 18 A. FiLix-FEMiNA Bernh. (Lady Fern.) Big Birdseye. 



CAMPTOSORUS Link. (Walking Leaf) 

 19 C. RHizoPHYLLus Link. Lake Scranton gorge, Elk Mountain, Camp- 

 bell's Ledge. Not rare in Abingtons. 



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