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. carolinianum 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 Housatonic 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. .Jkwelweed. 
I. biflora Walt. Jewelweed; Spotted Touch-me-not. — Rich 
moist soil in shade; common. 
forma Peasei A. H. Moore. — Perianth cream color, with pink spots 
M. Rhodora, 21: 9S, 1019, and 19: 116, 1917). 
Low ground, Stockliridge. 
I. pallida Nutt. Pale Touch-me-not. — Borders of streams and 
moist slopes; frequent in the valley, on the lower slopes of Grey- 
lock and of the Dome. A form with whitish flowers, Lanesboro 
(Churchill). 
