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. Blue-eyed Grass. 

 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 S. angustifolium. 



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



b. Inner bract of the spathe L5 to 3 cm. long; stems broadly winged. 

 Pedicels loosely spreading, much exceeding the inner bract. 



S. 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 T'urtis. — (S. graminoides 111. Fl. ed. 2.) 



IMcadows and fields; common. 



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

 sandy field, Sheffield (Fernald). 



ORCHIDACEAE. ORCHID F.\MILY. 

 ARETHUSA. 



A. bulbosa L. Aretius.x. — (Jprii liogs; occasioiud in tlic south- 

 ern part ot the County. Ward Pond, Hocket; Moiiti-rcy (Walters); 



