HOFFMANN: FLORA OF BERKSHIRE COUNTY. 253 
JUGLANS. 
J. cinerea L. Butternut. — Rich woods, open hillsides; common 
in the valley, frequent on the lower portions of the plateau (altitude 
1800 feet, Becket). 
BETULACEAE. BIRCH FAMILY. 
ALNUS. Alder. 
A. incana (L.) Moench. Speckled Alder. — Along streams, 
borders of swamps, and on the plateau along roadsides; common. 
A. crispa (Ait.) Pursh, var. mollis Fernald. — Dow:nt Green 
Alder. — (A. mollis Man. ed. 7; vid. Rhodora, 15: 4, 1913. A. 
Alnobetula 111. Fl. ed. 2.) 
Hoosac Mt., Florida; along the Deerfield River, Florida. 
A. rugosa (Du Roi) Spreng. Smooth Alder. — Borders of lakes 
and streams; occasional in the southern part of the valley. Stock- 
bridge; New Marlboro (Walters); Sheffield. 
BETULA. Birch. 
B. alba L., var. cordifolia (Regel) Fernald. Paper Birch; 
Canoe Birch.— {B. cordifolia III. Fl. ed. 2.) 
Hillsides; occasional. Pittsfield; West Stockbridge; Egremont 
(Walters). 
var. papyrifera (Marsh) Spach. — (B. jxipyrifera 111. Fl. ed. 2.) 
Woods; common. A specimen from Otis, determined by Dr. 
Rehdor, with mature leaves only 5 cm. long. 
B. lenta L. Black Birch; Cherry Birch. — Rich woods, banks 
of streams; frequent. 
B. lutea Michx. f. Yellow Birch. — Cool rocky woods; common. 
B. populifolia Marsh. White Birch; Gray Birch. — Sandy or 
ill-drained soil ; common in the southern part of the County, frequent 
elsewhere. Summits of Greylock (altitude 3400 feet) and The Dome. 
B. pumila L. Low or Swamp Birch. — Cold bogs; local. D. D. 
Field swamp and Nigger Pond, Stockbridge; Juniper Pond, New 
Marlboro. 
CARPINUS. Hornbeam; Ihon"wood. 
C. caroliniana Walt. American Hornbeam; Blue or Water 
Beech. — Along streiuns and Ixirdcrs of swamps, cool rocky liiilsides; 
frequent. 
