POL?PQpiAC$A$. . 11 



, Stipes blackish throughput ; lobes .acute or acuminate. 



2. A. ebenoides. 

 Leaves once pinnate. 



Pinnse 7 mm. to 8 cm. long, mostly blunt. 



Pinnaa aurieled at upper side of base. 3. A. platyneuron. 

 Pinnse not aurieled, partly alternate, partly opposite. 



4. A. Trichomanes. 

 Pinnae 5-12 cm. long, acute or acuminate. 5. A. dngustifolmm. 



Leaves 2-3 pinnatifid. ...... 



Stipes green; leaves ovate^delto.id; pinnules fan-shaped,. veins fla- 

 bellate. 6. A. Ruta-muraria. 



Stipes dark at the base, green above. 1. A. montanv/m. 



Stipes chestnut-brown throughout, as also the lower part of the 

 rachis. 8. A. Bradleyi. 



Sori usually more or less curved, sometimes horsesho«-shaped, often crossing 

 to the outer or lower side of the veinlet; large ferns. 

 Leaves 2-pinnatifid, segments blunt, scarcely crenate. 



9. A. acrostichoides. 

 Leaves 2-pinnate; pinnules, acute, toothgd or pinnatifid. 



10. A. Fitix-foem'iria. 



1. Asplenium pinnatifidum Nutt. M. p. 11. Rocks. Summer. 



Philadelphia— Wissahickon, Mart. (B. C), Palls of Schuylkill (Je.). 

 Delaware— 'Ridley Creek, T. C. Palmer (Fu.). iomcast^r— York Furnace, 

 Tucquan, Georgetown (P.). , ; 



2. Asplenium ebenoides R. R. Scott. M. p. 11. Limestone. Summer. 



Montgomery— East side Schuylkill (C. E. S.). Lancaster — York Fur- 

 nace (Cr.). Lehigh— (P.). Northampton— Glendon (P.). 



3. Asplenium platyneuron (L.) Oakes. M. p. 11. Rocky open wpod^. 



Summer. 



4. Asplenium teichomanes L. M. p. 11. Shaded cliffs. Summer. 



5. Asplenium an&ustifolium Michx.' M. p. 12. Rich woods. Autumn. 



Philadelphia— Manayunk (Gj^). Lancaster— Peach ^Bottom. Berks—. 

 Reading (P.). t>' ''' ' ' '- (e/--. <:-'-■ ■•.-•<(. ■ ><•< ■■ ;■'<' ■, •■■■■' ><■■ 



6. Asplenium Ruta-muraria L. M. p. 12. Limestone cliffs. Summer. 



Bucks — Riegelsville (Fr.). Montgomery — Conshohocken (C. E. S.). 

 Chester— Brook 's Mill (Fl. C.).- Lancaster— Millers ville (Cr.). Lehigh 

 — Helfrich's Springs (Kr.). Northampton— Easton, Porte? (B, C.). 



7. Asplenium montanum Willd. M. p. 12^. Rocks. Summer. 



Chester— Octoraro Creek (Le.) (St.)^ ( 'Lancaster— York Furnace, Tuc- 

 quan (Ca.) (Sa.),Fites Eddy (St.). Lehigh— Idlewild (Kr.). North- 

 ampton — Easton (P.). 



8. Asplenium Bradleyi D. C. Eaton. M. p. 12. Rocks. Summer. 



Lancaster — Tucquan, near Muddy Run (B r 0- 



9. Asplenium acrostichoides . Sw. M. p. 12. Rich woods. Summer. 



10. Asplenium filix-jtoemina (L.) Bernh. M.,p. 12. In woods, thickets 



and along fences. Summer. 



8. CAMP^OSORUS Link. 

 1. Camptosorus rhizophyllus (L.) Link. Walking Fern. M. p. 13. 

 Shaded rqeks. Summer, 

 Philadelphia— Byberry, M a rt. (B- C), above Maaayunk (He.), Wissa- 



