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 (Spreng.) Torr. Blunt-lobed Woodsia. — E.xposed 
rocks or shaded ledges, chiefly calcareous; occasional in the valley. 
Cheshire (Winslow); Pittsfield; Stockbridge; New Marlboro; 
Egremont (Walters); Sheffield. 
OSMUNDACEAE. FLOWERING FERN FAMILY. 
OSMUNDA. Flowering Fern. 
O. cinnamomea L. Cinnamon Fern. — 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. frondosa Man. ed. 7.) 
Sheffield (Churchill). 
O. Claytoniana L. Interrupted Fern. — Moist woods and on 
the plateau on ill-drained hillsides; common. 
0. regalis L., var. spectabilis (Willd.) Gray. Royal Fern. — 
(0. regalis Man. ed. 7; vid. 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. Moonwort; Grape Fern. 
B. angustisegmentum (Pease & Moore) Fernald. — (B. lancco- 
latmn, var. andustiscguicntuni Man. ed. 7; rid. Rhodora, 17: 87, 1915; 
B. lanccolahun 111. Fl. ed. 2.) 
Rich leaf mould, ciiicfiy imdcr deciduous trees, often with B. 
raviosvvt; frequent. 
B. dissectum Spreng. — (/i. obliquum, var. disaccttnii Man. ed. 7.) 
Woods and pastures; frequent. 
forma elongatum (Gilbert & Haberer), comb. nov. — {B. 
obliquum, var. clotujatutn Gilbert & Haberer, Fern Bull. 11: 89, 1903, 
and Man. ed. 7.) 
Pasture, Mt. Washington. 
