HOFFMANN: FLORA OF BERKSHIRE COUNTY. 201 



EQUISETACEAE. HORSETAIL FAMILY. 

 EQUISETUM. HoRSET.UL. 



E. arvense L. Common Horsetail. — Wet 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. — Wet gravelly banks; occasional. Williams- 

 town (Andrews); North Adams; Adams (Knowlton and Bean); 

 Stockbridge; New ^Marlboro. 



E. sylvaticum L., var. pauciramosum Wilde., forma multi- 

 ramosuni Fernald. — {E. sylvaticum Man. ed. 7 in part). 



Swampy woods and moist shaded banks; frequent. 



Practically all the material of E. sylraticum 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. Williamstown (Andrews); Stockbridge; Sheffield. 



LYCOPODLVCKAK. CLUB MOSS FAMILY. 

 LYCOPODIUM. Club Moss. 



Lycopodium annotinum L. — Cool woods; frequent, 

 var. acrifolium Fernald. — Vid. Rhodoru, 17: 124 (1915). 

 Mt. Washington (Floyd). 



Leaves nio.stly spreiidinp; or reflexed, those of the fruiting branches 5.5-11 

 mm. long L. annotinum. 



Leaves strongly ascending or appre.ssed, those of the fruiting branches 2.5- 

 6 mm. long var. acrifnliHtn. 



L. clavatum L. Common Ci.uh Moss. — Dry woods and clear- 

 ings; conunon. A form with elongated sterile spikes, mostly siniple, 

 2 to 3 dm. long and no fertile spikes, constant each season, has been 

 collected in Hancock (A. K. Harri.son). 



