600 LYCOPODIACEH. (CLUB-MOSS FAMILY.) 
ORDER 163. LYCOPODIACE. (Crvs-Moss Famity.) 
Perennial plants, with solid branching and mostly creeping stems, 
sparingly or thickly clothed with small, simple, sessile, awl-shaped or linear 
leaves. Fructification consisting of 1—3-celled solitary spore-cases, ax- 
illary, either along the main stem, or only in the axils of the upper and 
mostly changed (bract-like) leaves. 
1 LYCOPODIUM, L. Crvzs-Moss. 
Sporangia of one kind, coriaceous, commonly kidney-shaped, opening trans- 
versely into two valves and containing minute powdery spores. Perennial, 
mostly evergreen plants; the leaves imbricated in several or many rows along 
the stem and branches. 
§ 1. Sporangia borne along the stem, in the axils of uniform leaves. ! 
1. L. lucidulum, Michx. Stems ascending, forking, somewhat com- 
pressed; leaves (deep green) in several rows, linear-lanceolate, very acute, spar- 
ingly denticulate, spreading or reflexed. —Shady woods on the mountains of 
North Carolina, and northward. — Stem 6/-12'long. Leaves glossy. 
, 2. L.Selago, L. Stems short and thick, terete, clustered, erect or ascend- 
ing, forking; leaves in several rows, deep green, lanceolate, acute, entire, the 
upper erect, the lower spreading.— High mountains of North Carolina, and 
northward. — Stems 3!—6/ high, rigid. Leaves crowded. 
$ 2. Sporangia in the axils of the upper leaves, forming a terminal terete bracted spike. 
* Bracteal and stem leaves alike, spreading. 
3. L. alopecuroides, L. Stem thick, terete, forking near the base, re- 
curved, and rooting at the apex, very leafy; leaves in many rows, spreading, 
subulate, bristly-fringed below the middle; peduncles erect, 6/— 12" high, similar 
to the stem; spike thick, cylindrical, bristly from the spreading or recurved 
bracteal leaves.— Open pine-barren swamps, Florida to Mississippi, and north- 
ward. — Stems 19 — 13? long, pale green. 
. 4. L. inundatum, L. var. pinnatum. Stem rather slender, prostrate, 
creeping, pinnately branched ; leaves linear-subulate, bristly-fringed below the 
middle, unequal, the upper and lower ones shorter and somewhat appressed, the 
~ lateral ones widely spreading; peduncle mostly solitary, erect (19 high), very 
~ leafy; spike thick, cylindrical, 2 -3' long. — Low pine barrens, near the coast, 
West Florida. — Stem 6/— 15! long, and, with the spreading leaves, j^ wide. 
Hw * * Bracteal leaves wider than those of the stem. 
Due e + Leaves of the stem equal and alike. $ 
..5. L. clavatum, L. Stem very long, terete, creeping, with numerous 
like the ovate erosely-dentieulate bracts, with a spre: 
short and erect leafy branches ; peduncles with scattered leaves, each bearing 2~ E 
