HOFFMANN: FLORA OF BERKSHIRE COUNTY. 237 



Leaves smaller and narrower (main blade 10.5 to 20 cm. long, 3 to 

 5.5. cm. wide near middle); basal lobes shorter (2 to 7 cm. long), the 

 lobes only rarely divergent. 



SYMPLOCARPUS. Skunk Cabbage. 

 {Spathyema 111. Fl. ed. 2.) 



S. foetidus (L.) Nutt. Skunk Cabbage. — Swamps and low 

 ground; common in the valley, not noted on the plateau. Hinsdale, 

 altitude 1450 feet. 



LEMNACEAE. DUCKWEED FAMILY. 

 LEMNA. Duckweed. 



L. minor L. — Pools and slow streams; occasional in the valley. 

 Lenox; Stockbridge; West Stockbridge; Sheffield. 



L. trisulca L. — Pools in marshes, muddy ponds and slow streams; 

 local. Washington (altitude 1450 feet) ; two localities in Stockbridge; 

 Three Mile Pond, Sheffield. 



SPIRODELA. 



S. polyrhiza (L.) Schleid. — Stagnant pools and ponds; occasional 

 in the valley. Williamstown; Washington (altitude 1450 feet); 

 Stockbridge; New Marlboro; Sheffield (Walters). 



ERIOCAULACEAE. PIPEWORT FAMILY. 

 ERIOCAULON, Pipewort. 



E. septangulare Withering. Pipewort. — {E. articitlatum Man. 

 ed. 7; rid. Rhodora, 11: 40, 1909.) 



Shallow water of ponds on gravelly bottom, or on rocky shores; 

 common. 



XVHIDACKAE. YELLOW-EYED GRASS FAMIIA. 



XYRIS. Yellow-eyed Grass. 



X. caroliniana Walt. Yellow-eyed Gra.s.s. — Poaty borders of 

 ponds; occasional. Otis; Plant in Pond, Mt. Washington; Shefru-ld. 



