296 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 



Locally common on the summit of The Dome and about Plantin 

 Pond, Mt. Washington. The most northern known station for this 

 species of the Alleghany Mts. 



I. verticillata (L.) Gray. Black Alder. — Common on the 

 plateau on open ill-drained hillsides and along roadsides; frequent in 

 the valley on the borders of ponds and swamps. 



var. tenuifolia (Torr.) Wats. — (/. hronxensis 111. Fl. ed. 2.) 



Shaded swamps; frequent. 



var. padifolia (Willd.) T. &. G.— Sheffield (Churchill). 



NEMOPANTHUS. Mountain Holly. 

 {Ilicioides 111. Fl. ed. 2.) 



N. mucronata (L.) Trel. Mountain Holly. — Borders of ponds, 

 boggy woods and rocky hill-tops; common. 



CELASTRACEAE. STAFF TREE FAMILY. 

 CELASTRUS. Staff Tree. 



C. scandens L. Climbing Bitter-sweet; Waxwork. — Open 

 rocky woods, roadside thickets and borders of streams; common in 

 the valley. 



EVONYMUS. 



{Evonymus 111. Fl. ed. 2.) 



E. ATROPURPUREUs Jacq. Burning Bush. — Escaping from culti- 

 vation, Stockbridge. 



STAPHYLEACEAE. BLADDER NUT FAMILY. 

 STAPHYLEA. Bladder Nut. 



S. trifolia L. Bladder Nut. — Rich soil at the base of limestone 

 ledges, and moist thickets along the Housatonic River; occasional. 

 Pittsfield; Stockbridge; Great Barrington; Sheffield. 



ACERACEAE. MAPLE FAMILY. 

 ACER. Maple. 



A. Negundo L. Box Elder. — Apparently indigenous along the 

 Housatonic River; also frequently escaping from cultivation. 



