HOFFMANN: FLORA OF BERKSHIRE COUNTY. 201 
EQUISETACEAE. HORSETAIL FAMILY. 
EQUISETUM. Horsetail. 
E. arvense L. Common Horsetail. — ^Yet roadsides, and banks 
and sandy shores; common. 
E. fluviatile L. Pipes. — Marshes, shallow water and muddy 
shores; common. 
E. hyemale L., var. affine (Engelm.) A. A. Eaton. Scouring 
Rush. — Sandy or gravelly banks ; frequent. 
forma ramosum A. A. Eaton.— Vid. Fern Bull. 11: 112 (1903). 
Occasional. Florida; Great Barrington. 
E. scirpoides Michx. — ^Yet gravelly banks ; occasional. Williams- 
town (Andrews); North Adams; Adams (Knowlton and Bean); 
Stockbridge; New Marlboro. 
E. sylvaticum L., var. pauciramosum \Yilde., forma multi- 
ramosum Fernald. — {E. sylvaticum. Man. ed. 7 in part). 
Swampy woods and moist shaded banks; frequent. 
Practically all the material of E. sylvaticum collected in Berkshire 
County is the freely-forking form, described by Professor Fernald 
(Rhodora, 20: 131, 1918). A specimen from Adams, less freely 
forking, might be considered the typical var. pauciramosum. 
E. variegatum Schleich. — Low ground or wet gravelly banks; 
occasional. \Villiamstown (Andrews); Stockbridge; Sheffield. 
LYCOPODIACEAE. CLUB MOSS FAMILY. 
LYCOPODIUM. Club Moss. 
Lycopodium annotinum L. — Cool woods; frequent, 
var. acrifolium Fernald. — I' id. Rhodora, 17: 12-4 (1915). 
Mt. Washington (Floyd). 
Leaves mostly spreading or rcflcxcd, those of the t'niitiiifi liranches o.o-ll 
mm. lonp; L. annotinum. 
Leaves stron{i;Iy ascending or appressed, those of the fniitinji liranches 2.o- 
6 nun. loiifi var. acrifolliini. 
L. clavatum L. Common Ci,ith Moss. — Dry woods and clear- 
ings; connnon. A form with elongated sterile spikes, mostly simple, 
2 to 3 dm. long and no fertile spikes, constant each season, lias been 
collected in Hancock (\. K. Harrison). 
