HOFFMANN: FLORA OF BERKSHIRE COUNTY. 245 



NARCISSUS. 



N. POETicus L. Poet's Narcissus. — A single plant in a mowing 

 field, across the road from an abandoned house, Alford (Walters). 



IRIDACEAE. IRIS FAMILY. 

 IRIS. Fleur-de-lis. 



I. versicolor L. Blue Flag. — Wet meadows, borders of streams 

 and ponds, wet open hillsides; common. Altitude 2000 feet, Mt. 

 Washington. 



SISYRINCHIUM. Bltje-eyed Gbass. 



Key to Sisyrinchium. 



a. Spathes sessile, terminal and solitary. 



Pedicels loosely spreading, much exceeding the inner bract; capsules 2 to 



4 mm. high. Rare S. mucronatum. 



Pedicels suberect, scarcely exceeding the inner bract; capsules 4 to 6 mm. 



high. Common iS. angusiifoliwm. 



a'. Spathes peduncled from the axil of the leaf-like bract. 



b. Inner bract of the spathe 1.5 to 3 cm. long; stems broadly winged. 

 Pedicels loosely spreading, much exceeding the inner bract. 



iS. gramineum. 

 Pedicels strongly ascending, rarely exceeding the inner bract. 



S. angustifolium. 



b'. Inner bract of the spathe 1 to 1.5 cm. long; stems slender and narrowly 



margined S. atlanticum. 



S. angustifolium Mill. — Meadows and open places in woods; 

 common. 



S. atlanticum Bicknell.-^- Low meadows, borders of bogs and 

 swamps ; frequent on the plateau, occasional in the valley (Pittsfield, 

 Stockbridge). 



S. gramineum Curtis. — (S. graminoides 111. Fl. ed. 2.) 



Meadows and fields; common. 



S. mucronatum Michx. — Meadow, Cheshire Harbor (Cushman); 

 sandy field, Shefiield (Fernald). 



ORCHIDACEAE. ORCHID FAMILY. 

 ARETHUSA. 



A. bulbosa L. Arethusa. — Open bogs; occasional in the south- 

 ern part of the County. Ward Pond, Becket; Monterey (Walters) ; 



