CLUB-MOSS FAMILY. 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 rettexed, sharp-pointed, irregularly serrulate, 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, fertile ones 6'- 18' 

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

 bristly-dilute leaves, those of the spike with long slender tips. 



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



broader than those of the sterile branches. 

 * Spike sessile at the top of an ordinary branch. 



L. anno'tinum. 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, GROUND-PIKE. Moist woods, common N. : rootstock 

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

 hemlock, 9' - 1 2' 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 only a 



few inconspicuous leaves. 

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



L. Car Olmianu.nl. Wet pine-barrens, New Jersey and S. : scarcely 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 Jours. 



Ii. 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. cpmplanatum. Dry woods, commonest among evergreens : running 

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

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

 tened branchlets. 



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

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



1. Native species. 



S. rupdstris. Exposed rocks : 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. apus. 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 edgewise, and two upper rows of smaller appressed leaves. Spike 

 four-cornered, at the ends of the branchlets. 



