638 LYCOPODIACEiE. (CLUB-MOSS FAMILY.) 
(Var. montknum, Tuckerm ) — Woods, common northward : the var. 
on the White Mountains, with intermediate forms around the base. 
July. 
6. Li. dendroideilin, Michx. (Ground-Pine.) Stems up¬ 
right (6' - 9' high) from a subterranean creeping rootstock, simple below, 
and clothed with homogeneous lanceolate-linear acute entire leaves 
appressed-erect in 4-6 rows, hushy-branched at the summit; the 
crowded branches spreading, fan like , with the lower row of leaves 
shorter and the lateral spreading, — in var. obscurum appearing flat, 
from the leaves of the upper side being also shorter and appressed. 
(L. obscurum, L., the older name, applied to the plant in a sterile state, 
had best give way to the characteristic name of Michaux, unless, with 
Bigelow, we preserve it for the flat-branched plant, which is very 
likely a distinct species.) — Moist woods. Aug. — Remarkable for 
its tree-like growth. Spikes solitary, or 2 to 3, cylindrical. 
Spikes peduncled: viz. the leaves minute on the fertile branches. 
** Leaves homogeneous and equal, many-ranked : stems terete. 
7. E. clavatum, L. (Common Club-Moss.) Stems creeping 
extensively, with similar ascending short and very leafy branches; 
the fertile terminated by a slender peduncle (d'-C' long) bearing about 
2-3 (rarely 1 or 4) linear-cylindrical spikes ; leaves linear-awl-shaped, 
incurved-spreading (light green), tipped as also the bracts with a 
fine bristle. — Dry woods, common, especially northward. July. 
-»-►++ Leaves of two forms,feio-ranked : stems or branches fattened. 
8. Li. Caroliulanuin, L. Sterile stems and their few short 
branches entirely creeping (leafless and rooting on the under side), 
thickly clothed with broadly lanceolate acute and somewhat oblique 
1-nerved lateral leaves widely spreading in 2 ranks , and a shorter in¬ 
termediate row appressed on the upper side ; also sending up a slender 
peduncle (2*-4* high, clothed merely with small bract-like and ap¬ 
pressed awl-shaped leaves), bearing a single cylindrical spike. — Wet 
Pine barrens, New Jersey and southward. July. 
9. E. COlliplanatuin, L. Stems extensively creeping (often 
subterranean), the erect or ascending branches several times forked 
above; branchlets e qual, crowded, spreading , somewhat fan-like, flnt- 
tened, all clothed with minute imbricated-appressed aicl-shaped leaves in 
4 ranks, with decurrent-united bases, the lateral rows with slightly 
spreading tooth-like tips, those of the upper and under rows smaller, 
narrower, wholly appressed; peduncle slender, bearing 2-4 cylin¬ 
drical spikes. — Dry woods and copses, common. July. 
2. SEEA.GHVEEEA, Beauv., Spring. Selaginella* 
Fructification of two kinds, namely, of spore-cases like those of 
Lycopodium* but very minute and oblong or globular, containing 
