HOFFMANN: FLORA OF BERKSHIRE COUNTY. 231 
C. trichocarpa Muhl. — Marshes in the Hoosac Valley. Williams- 
town (Churchill). 
C. trisperma Dewey.— Swampy woods; common, 
var. Billingsii Knight. — Peat bogs; local. Savoy; Lost Pond, 
Becket; Wolf Swamp, Sandisfield. 
C. Tuckermani Dewey. — Swales in the Housatonic and Konkapot 
Valleys in the southern part of the County; frequent in Sheffield, 
occasional elsewhere (Stockbridge, New Marlboro). 
C. typhina Schwein. — (C. iyphmoides Man. ed. 7; vid. Rhodora, 
11: 40, 1909.) 
Shaded swale in the southern part of Sheffield, just inside the State 
Line. 
C. umbellata Schkuhr. — Rocky summits and dry open soil; 
frequent. 
var. brevirostris Boott. — (C. abdita 111. Fl. ed. 2.) 
Rocky or sandy soil. Williamstown; Sandisfield; Sheffield. 
var. tonsa Fernald. — (C. tonsa 111. Fl. ed. 2.) 
Sand-plain, Ashley Falls, Sheffield. 
C. varia Muhl— (Man. ed. 7.) 
Rocky woods; frequent in the valley. According to Mr. K. K. 
Mackenzie, Berkshire material corresponds to C. Emmonsii Dewey. 
C. vesicaria L. — Shaded swamps and swales; frequent. 
var. jejuna Fernald. — (C. monile 111. Fl. ed. 2 in part.) 
Swale near the Housatonic River, Lenox. A form closely approach- 
ing this variety at Ward Pond, BecJvct. 
var. monile (Tuckerm.) Fernald. — Swampy ground; occasional. 
Richmond; Lenox. 
C. virescens Muhl. — Dry, open woods, antl clearings; common in 
the valliy . 
var. Swanii Fernald. — (C, Swanii 111. Fl. ed. 2.) 
Dry, open woods and hillside pastures; common. 
C. vulpinoidea Michx. — Low ground; common. 
C. lupulina X lurida. — Low ground; occasional. Stockbridge; 
Great Barrington. 
CLADIUM. 'PwKi Rcsii. 
{Murisnis 111. I'l. c.l. -J.) 
C. mariscoides (Muhl.) Torr. — Bogs and marshes; occasional in 
the valley. Stockbridge; (ir<>at Barrington; Fgrcmont ; Shcilield. 
