CLUB-MOSS FAJIILY. • 373 



§ 1. Fructification not in a distinct spike. Leaves all alike, dark-green, rigid, 

 in about 8 rows. 



L. lucidulum. Damp woods N. : stems 4' - 8' long, tufted, ascending, 

 forking ; leaves spreading or retlexed, sharp-pointed, irregularly sornilate, dark 

 green and shining. 



§ 2. Fructification spiked at the top of an erect branch .-fertile leaves and those of 

 the creeping stems nearly alike, soft, narrowly linear, many-rowed. 



L. alopecuroides. Pine-barren swamps, New Jersey & S. : scarcely ever- 

 green: stem and sparingly forked sterile branches creeping, fertQe ones 6'- 18' 

 high, all rather stout and tliickly clothed with spreading soft linear-awl-shaped 

 bristly-ciliate leaves, those of the spikd with long slender tips. 



§ 3. Fructification spliced: the fruiting leaves yellowish, scale-like, shorter and 

 -i> broader than those of the sterile branches. 

 * Spike sessile at the top of an ordinary branch. 



L. anndtinum. Cold woods N. : stem creeping, l°-4° long; branches 

 4'-9' high, nearly erect, once or twice forked ; leaves about 5-rowed, spreading 

 or reflexed, rigid, lanceolate, acute, nearly entire ; those of the solitary spikes 

 ovate, with spreading points and ragged scarious margins. 



L. dendroideum, Gkound-Pine. Moist woods, common N. : rootstock 

 creeping, under-ground, nearly leafless ; stems looking much like a miniature 

 hemlock, 9' -12' high; the many spreading branches with shining lanceolate 

 entire leaves in about six rows ; leaves of the lower and often of the upper row 

 smaller than the rest; spikes single, or 4-10 on a plant; scales ovate pointed, 

 margin slightly scarious, nearly entire. 



* * Spikes raised above the ordinary branches on a slender stalk which has oily a 

 few inconspicuous leaves. 

 ^- Stems creeping, very short : spikes always single. 



L. Carolini^num. Wet pine-barrens, New Jersey and S. : scai-cely ever- 

 green ; stem and prostrate branches rooting underneath ; leaves soft, lanceolate, 

 entire, spreading horizontally, with an upper appressed row ; spikes slender on 

 stalks 4' - 6' high. — Allied in habit to L. alopecuroides. 



-I- ^- Stems extensively creeping : spikes often in pairs or fours. 



L. clavatum. Club-moss. Common N. in dry woods : running stem long 

 and leafy ; branches mostly erect, cordlike, irregularly pinnate ; branchlets, 

 4-10, thickly covered with linear-awl-shaped entire commonly bristle-tipped 

 leaves ; spikes mostly in pairs. 



L. complan^tum. Dry woods, commonest among evergreens : running 

 stems with scattered awl-shaped very small leaves ; bi-_anches erect, several times 

 branched ; the parts repeatedly forked into many horizontally spreading flat- 

 tened branchlets. 



2. SELAGINELLA. (Name a diminutive of Sdago, a species of Lyco- 

 podium. ) Species over 200, the greater part tropical. 



§ 1 . Native species. 



S. rup6stris. Exposed roclcs : a common moss-like little evergreen ; stems 

 and densely tufted branches l'-2' high ; leaves awl-shaped, marked with a nar- 

 row furrow on the back, and tipped with a minute bristly point ; spikes four- 

 cornered. 



S. 4pus. Damp places in meadows ; common, especially S. : very delicate ; 

 stems 2' -4' high, sparingly branched ; leaves 4-rowed, those of the side rows 

 spreading horizontally, scarcely 1" long, ovate with the upper side larger, mi- 

 nutely serrulate ; intermediate ones half as large, erect, very acute ; spikes 

 2" -6" long. — Often cult, as S. densa. 



§2. Cultivated, mostly tropical species, seen in conservatories: much branched: 

 leaves of the branches four-rowed., two side rows of spreading leaves set ap- 

 parently edgr-wise, ana two upper rows of smaller oppressed leaves. Spike 

 four-cornerti, at the ends of the branchlets. 



