LYCOPODIACEJ&. (CLUB-MOSS FAMILY.) 601 
+ + Leaves of the flattened stem and branches unequal. 
6. L. dendroideum, Michx. Stem erect (6/ —12/), clothed with scattered 
appressed subulate and entire leaves, simple below, bearing above numerous 
forking and spreading fan-like mostly compressed branches ; lower row of leaves, 
and sometimes the upper, shorter, the lateral ones spreading ; peduncles short, 
bearing one or more cylindrical spikes; bracts spreading, ovate, acute, crenate 
on the margins. (L. obscurum, Z.). — High mountains of North Carolina, and 
northward. 
7. L. Carolinianum, L. Stem creeping, pinnately branched, naked 
and rooting beneath; upper leaves short appressed, the lateral ones widely 
spreading, lanceolate, acute, entire; peduncle slender (6/-12/ high), clothed 
with sgattered subulate leaves, and bearing a single linear spike; bracts ovate, 
acuminate, spreading. — Low pine barrens, Florida, and northward. — Stem 2! - 
8! long. e 
8. L. complanatum, L. Stem long and creeping, the numerous erect 
branches successively forking into many linear crowded flattened branchlets ; 
leaves minute, subulate, imbricated in 4 rows, the lateral ones slightly spread- 
ing; peduncles with minute scattered leaves, slender, bearing 2-4 erect cylin- 
drical spikes. — Woods along the Alleghanies, and northward. — Stem 2? - 10? 
2. SELAGINELLA, Beauv. 
Fructification of two kinds, either in the same or separate axils; one kind as 
in Lycopodium, the other with sporangia containing few (mostly 3-4) larger 
spores. Spikes 4-angled. - 
1. S. rupestris, Spring. Stems rigid, densely clustered, erect or spread- 
ing, much branched ; leaves (grayish) subulate, rigid, rough-fringed on the mar- 
gins, bristle-pointed, closely imbricated in many rows; spikes linear, nearly 
sessile. — Dry sand ridges in the pine barrens, and on dry rocks, Florida, and 
northward. — Stems 2! - 3' high. 
9. S. apus, Spring. Stems prostrate, creeping, slender, branched ; leaves 
seattered, unequal, the lateral ones larger and widely spreading, 2-ranked, 
ovate, acute or obtuse, membranaceous, denticulate on the margins; the others 
smaller, acuminate, and appressed; bracts of the short sessile spike similar to 
the leaves.-— Low shady woods, Florida, and northward. — Plant whitish. 
Stems 3! - 9! long. ; i 
3. PSILOTUM, R. Brown. 
... Sporangia of one kind sessile, globular, opening at the apex into 2-3 valves, 
and filled with very minute powdery spores. t 
.. 1 P. triquetrum, Swartz. Stem forking, compressed, the bra hes 3- 
