HOFFMANN: FLORA OF BERKSHIRE COUNTY. 295 



frequent. Common on limestone hills in Sheffield and New Marl- 

 boro. 



E. maculata L. — (C. maculata 111. Fl. ed. 2.) 



Dry open ground, roadsides, railroad tracks and cultivated ground; 

 frequent. 



E. Preslii Guss.— (C. Preslii 111. Fl. ed. 2.) 



Waste ground, Pittsfield. 



CALLITRICHACEAE. 

 CALLITRICHE. Water Stabwokt. 



C. palustris L. — ^ Pools and borders of brooks, muddy shores; 

 frequent. 



ANACARDIACEAE. 

 RHUS. Sumach. 

 {Toxicodendron 111. Fl. ed. 2 in part.) 



R. copallina L. Dwaef Sumach. — Dry sandy soil and rocky 

 hills ; frequent in the southern part of the valley. 



R. glabra L. Smooth Sumach. — Dry sandy soil, open rocky 

 woods and pastiu-es"; common in the southern part of the valley. 



R. Toxicodendron L. Poison Ivy; Poison Oak. — {T. Toxico- 

 dendron 111. Fl. ed. 2.) 



Wet woods, roadsides, railroad embankments and rocky summits; 

 frequent. Altitude 1800 feet (Washington). 



var. radicans (L.) Torr. — ( T. radicans 111. Fl. ed. 2.) 



Damp woods and borders of streams; occasional in the valley. 

 Williamstown; Richmond; Stockbridge; Lee; Sandisfield; New 

 Marlboro. 



R. typhina L. Staghoen Sumach. — {R. hirta 111. Fl. ed. 2.) 



Borders of woods, rocky hills, roadsides and pastures; common. 



R. Vernix L. Poison Sumach; Poison Dogwood. — (T. Vernix 

 111. Fl. ed. 2.) 



Swamps and low ground; occasional in the southern part of the 

 valley. 



AQUIFOLIACEAE. HOLLY FAMILY. 

 ILEX. Holly. 



I. monticola Gray, var. mollis (Gray) Britton.^ (/. montana 111. 

 Fl. ed. 2.) 



