60 Rhodora [APRIL 
EQUISETACEAE. 
EQUISETUM. 
E. arvense L. Moist sand and gravel, occasional in richer soil. 
Very common and variable. 
. sylvaticum L. Wet fields and woods, frequent. 
. litorale Kühlewein. Wet shore of Merrimac River in Amesbury 
and Newburyport (A. A. Eaton & Raynal Dodge). 
E. fluviatile L. (E. limosum L.) Stagnant water. Frequent, 
especially in northern portion of the district. 
E. hyemale L., var. affine (Engelm.) A. A. Eaton. Moist soil, 
infrequent. (All the material examined is of this variety, which 
is distinguished from the typical form by having rounded instead 
of biangulate ridges). 
E. scirpoides Michx. Wet clay bank under hemlocks, Amesbury 
(A. A. Eaton). 
LYCOPODIACEAE. 
LYCOPODIUM. 
L. lucidulum Michx. Damp woods, frequent. 
L. inundatum L. Wet sand, rare. Not reported south of Boston. 
Var. Bigelovii Tuckerm. Swamps and borders of ponds, occasional.! 
L. annotinum L. Rich woods, abundant in Essex and Manchester. 
L. clavatum L. Dry woods, occasional. 
L. obscurum L. Moist woods, occasional. 
Var. dendroideum (Michx.) D. C. Eaton. As common as the 
typical form. 
L. complanatum, L., var flabelliforme Fernald. Originally common 
in dry woods and pastures, but eradicated in many places. 
L. tristachyum Pursh. (L. complanatum, var. Chamaecyparissus 
Milde.) Open woods and pastures. Abundant in a few locali- 
ties, but not generally distributed. 
1Note, The plant reported from Plum Island, Newbury, as L. alopecuroides L. 
(Fern Bulletin v. 4) has been carefully examined, and the committee has decided it is 
not different from this variety. 
