10 FLORA OF PHILADELPHIA. 



3. PTERIDIUM Scop. Brake or Bracken. 

 1. Pteridium aquilinum (L.) Kuhn. Common Brake. M. p. 8. Thickets 

 and hillsides. Summer. 



4. PELLAEA Link. 

 1. Pellaea atropurpukea (L.) Link. Cliff Brale. M. p. 9. Rocks, pre- 

 ferring limestone. Summer. 

 Philadelphia — Shawmont (Sa.). Bucks — Nockamixon. Montgomery — 

 Lafayette, Ivy Eock, Conshohocken (Re.). C/tesier— Phcenixville (Sa.). 

 Lancaster — (P.). Berks — Reading (Wn.). Lehigh — Rockdale (Kr.). 

 Northampton — Easton, Porter (B. C). Dauphin — Harrisburg (Wn.). 



5. CHEILANTHES Sw. 

 1. Cheilanthes lanosa (Michx.) Watt. Lip Fern. M. p. 9. Rocks. 

 Summer. 

 Bucks — Pipersville, Sellersville (Fr.), Zieglersville (Je.), Nockamixon 

 (Le.), Neshaminy (Re.) (Ws.). Montgomery — Valley Forge, I. Burk 

 (He.), Mill Creek (C. E. S.), Lafayette (Te.). Delaware— "^est of Hol- 

 land's Bridge, Dr. Geo. Smith (Fu.). C/iesier— Phoenixville (Sa.), Green- 

 tree (Te.). Lancaster — Octoraro Creek, near Maryland line (Pr.), Safe 

 Harbor, Tucquan (Br.). ^erAs— Reading (P.). Northampton— Y,as- 

 ton (P.). 



Hunterdon— JjSimhertville, Milford (C). 



New Castle — Below Jessups, opposite Rockford. 



6. WOODWARDIA J. E. Smith. Chain Fern. 



Leaves uniform; veins free between the sori and the margin. 



1. W. Virginica. 

 Leaves of two kinds; veins everywhere anastomosing. 2. W. areolata. 



1. Woodwakdia Virginica (L.) J. F. Smith. M. p. 10. Swamps. Summer. 



Bucks— Tulljtown (Cr.) (Wn.), Bristol (Fr.). Delaivar e—Tinicum.. 

 Northampton — Moore Twp. (P.). Burlington — Taunton (Sts.), Pember- 

 ton (Te.). Camden — Winslow, Mart. (B. C). Gloucester — Paulsboro 

 (Ja.), Mickleton (He.), Woodbury (Je.), Swedesboro, Repaupo (Li.). 

 Cape May—Sea. Isle Junction (Sa.). Atla7itic— 'Egg Harbor (Le.) (U. 

 C. S.), May's Landing (Te.). Monmouth— Ocean Beach, between Deal 

 and Elberon (C), Asbury Park (Te.). Mercer— Trenton (C). 



New Castle — Cedar Swamp, Collins. 



2. WooDWARDiA areolata (L.) Moore. M. p. 10. Swamps and wet woods. 



Summer. 

 jBmcA^s— Tullytown (Cr.) (Wn.). DeZawa^-e— Tinicum. 

 New Jersey — Common. 

 New Castle— "Not rare. 



7. ASPLENIUM L. Spleenwort. 



Sori straight or rarely slightly cun-ed, attached to the upper side of a vein, 

 small (except 5). 

 Leaves pinnatifid or pinnate below, tapering to a point. 



Stipes blackish below; lobe* rounded or the lowest acuminate. 



1. A. pinmatifidum. 



