HOFFMANN: FLORA OF BERKSHIRE COUNTY. 297 



A. pennsylvanicum L. Striped Maple; Moosewood.— Rich 

 woods; common on the upland. 



A. rubrum L. Red Maple; Swamp Maple. — Swamps, borders 

 of ponds and rocky summits; common. 



var. tridens ^Yood. — (A. caroUnianum 111. Fl. ed. 2.) 



Low ground; occasional. Cheshire (Winslow); Pittsfield; Lenox; 

 Stockbridge; New Marlboro; Sheffield. 



A. saccharinum L. White Maple; River Maple. — Banks of 

 streams; common. 



A. saccharum Marsh. Sugar Maple; Rock Maple. — Rich 

 woods; common, particularly on mountain slopes. 



var. nigrum (Michx. f.) Britton. Black Sugar Maple. — {A. 

 nigrum 111. Fl. ed. 2.) 



Common as a shade tree in the southern part of the valley. In- 

 digenous on a limestone ridge in Williamstown, in alluvial woods in 

 North Adams (Fernald), and on a cobble over the Housatonie River 

 in Sheffield. 



A. spicatum Lam. Mountain Maple. — Cool woods; common 

 on the upland, frequent in the valleys. 



SAPINDACEAE. SOAPBERRY FAMILY. 

 AESCULUS. 



A. HipPOCASTANUM L. CoMMON HoRSE-CHESTNUT. — Occasionally 

 self-sown. 



BALSAMINACEAE. TOUCH-ME-NOT FAMILY. 

 IMPATIENS. .Jewelweed. 



I. biflora \Yalt. Jewelweed; Spotted Touch-me-not. — Rich 

 moist soil in shade; common. 



forma Peasei A. H. Moore. — Perianth cream color, with pink spots 

 (vid. Rliodora, 21: 98. 1!)19. and 19: ]\i\, H»17). 



Low ground, Stockbridge. 



I. pallida Nutt, Pale Touch-me-not. — Borders of streams and 

 -moist slopes; frequent in the valley, on the Iowit slopes of Grey- 

 lock and of the Dome. A form with wiiitish flowers, Lanesboro 

 (Churchill). 



