8 FLOBA OF PHILADELPHIA. 



Leaf segments laciniate ; narrow, 1 mm. or less wide. 



4. B. dissectum. 

 Bud enclosed in a cavity at one side of the base of the stem ; leaf ternate, 

 decompound, sessile at the middle of the stem. 5. B. Virginianum. 



1. BoTRYCHiUM MATRiCARiAEFOLiUM A. Br. M. p. 3. Moist woods. Early 



summer. 

 Delaware — Swarthmore (Ca.). 

 Salem — Eiddleton (Le.) (Li.). 



2. BoTRYCHiUM SIMPLEX E. Hitchcock. M. p. 3. Moist woods, meadows 



and swamps. Spring. 

 N ortliampton — Easton (P.). 



3. BOTRYCHIUM OBLiQUUM Mvihl. M. p. 3. Low woods and open places. 



Summer. 



4. BOTRYCHIUM DISSECTUM Spreug. M. p. 3. Woods and open places. 



Summer. 



5. BOTRYCHIUM Virginianum (L.) Sw. M. p. 4. Rich woods. Summer. 



Faiuily 2. OSMUNDACEAE K. Br. 



1. OSMUNDA L. Flowering Fern. 



liCaves bipinnate, fertile at apex. 1. 0. regalis. 



Sterile leaves bipinnatifid. 



Pinnae of sterile leaf with a tuft of tomentum at base; fertile leaf dis- 

 tinct from sterile. 2. 0. cinnamomea. 

 Pinnae of sterile leaf without a tuft of tomentum at base; leaves fertile 

 in the middle. 3. 0. Claytoniana. 



1. OSMUNDA REGALIS L. Boyal Fern. M. p. 4. Swamps and wet woods. 



Spring. 



2. Osmunda cinnamomea L. Cinnamon Fern. M. p. 4, Wet places. 



Spring. 



3. Osmunda Claytoniana L. M. p. 4. Moist places. Spring. 



Family 3. SCHIZAEACEAE Reichenb. 



Sporanges in close 2-ranked spikes ; leaves filiform or linear. 1. Schizaea. 

 Sporanges in ample panicles; pinnules palmate. 2. Lygodium. 



1. SCHIZAEA J. E. Smith. 



1. Schizaea pusilla Pursh. M. p. 5. Low ground in pine barrens. Autumn. 



Burlington — ilwaker Bridge (Fr.) (Pr.), Speedwell (St.), Atsion 



(Te.). Atlantic —'E.gg Harbor, Pleasant Mills, Hospitality, 8th Street 



(C), Absecon (Ja.) (Wn.). Ocean— Forked River, Ferago, Kettle 



Creek (C), Toms River (Fu.), Island Heights Junction (Mac). 



2. LYGODIUM Sw. 



1. Lygodium palmatum (Bernh.) Sw. Climbing Fern. M. p. 6. Moist 

 thickets and open woods. Autumn. 

 Philadelphia— y^issahiekon, Dr. Geo. Smith (Fu.). Bttcts— Yardley- 

 ville, L. L. Smith (B. Sm.). 



