HOFFMANN: FLORA OF BERKSHIRE COUNTY. 199 



WOODSIA. 



W. ilvensis (L.) R. Br. Rusty Woodsia. — Exposed rocks; occa- 

 sional.. Stockbridge; West Stockbridge; Monterey; New Marlboro; 

 Mt. Washington; Sheffield. 



W. obtusa (Sprang.) Torr. Blunt-lobed W^oodsia. — Exposed 

 rocks or shaded ledges, chiefly calcareous; occasional in the valley. 

 Cheshire (Winslow); Pittsfield; Stockbridge; New Marlboro; 

 Egremont (Walters); Sheffield. 



OSMUNDACEAE. FLOWERING FERN FAMILY. 

 OSMTJNDA. Flowering Feen. 



O. cinnamomea L. Cinnamon Feen. — Low wet woods, borders 

 of swamps in the valley, and wet hillsides on the plateau, where it 

 reaches an altitude of 2100 feet (Florida) ; common. 



forma bipinnatifida Clute.— Swampy woods, Sandisfield. 



forma frondosa (T. & G.) Britton. — (var. frohdosa Man. ed. 7.) 



Sheffield (Churchill). 



O. Claytoniana L. Intekeupted Feen. — Moist woods and on 

 the plateau on ill-drained hillsides; common. 



O. regalis L., var. spectabilis (Willd.) Gray. Royal Feen. — 

 (O.regalisMan.ed.l; md. Rhodora, 21 : 176,1919.) 



Borders of ponds, swamps and wet woods, reaching an altitude of 

 2000 feet (Savoy); frequent. 



OPHIOGLOSSACEAE. ADDER'S TONGUE FAMILY. 

 BOTRYCHIUM. Moonwoet; Geape Fern. 



B. angustisegmentum (Pease & Moore) Femald. — {B. lanceo- 

 latum,Ya,T. angustisegmentum Man. ed. 7; vid. Rhodora, 17: 87, 1915; 

 B. lanceolatum 111. Fl. ed. 2.) 



Rich leaf mould, chiefly under deciduous trees, often with B. 

 ramosum; frequent. 



B. dissectum Spreng. — {B. obliquum, var. dissectum Man. ed. 7.) 



Woods and pastures; frequent. 



forma elongatum (Gilbert & Haberer), comb. nov. — (B. 

 obliquum, var. elongatum Gilbert & Haberer, Fern Bull. 11 : 89, 1903, 

 and Man. ed. 7.) 



Pasture, Mt. Washington. . 



