696 LYCOPODIACE^:. (CLUB-MOSS FAMILY.) 



as specimens collected in 1854 show very plainly. (For their true nature see 

 Sachs' Lehrbuch, Engl. trans., p. 411.) 



2. L. lucid.ulu.in, Michx. Stems assurgent, less rigid, dichotomous (6 - 

 12' long) ; leaves pointed, toothed, at first spreading, then deflexed, arranged 

 in alternate zones of shorter and longer leaves, the shorter leaves more fre- 

 quently bearing sporangia in their axils ; proliferous gemmae usually abun- 

 dant. Cold, damp woods ; common northward. Aug. 



2. Spore-cases only in the axils of the upper (bracteal) leaves, thus forming a 



spike. 



* Leaves of the creeping sterile and of the upright fertile stems or branches and 



those of the simple spike nearly alike, many-ranked. 



3. L. inundatum, L. Dwarf; creeping sterile stems forking, flaccid ; 

 the fertile solitary (1 -4' high), bearing a short thick spike; leaves lanceolate 

 or lance-awl-shaped, acute, soft, spreading, mostly entire, those of the prostrate 

 stems curving upward. Var. BiGEL6vn, Tuckerm., has fertile stems 5 -7' 

 high, its leaves more awl-shaped and pointed, sparser and more upright, often 

 somewhat teeth-bearing. Sandy bogs, northward, not common ; the var., 

 eastern New Eng. to N. J., and southward. Aug. (Eu.) 



4. L. alopecuroides, L. Stems stout, very densely leafy throughout ; 

 the sterile branches recur ved-procum bent and creeping ; the fertile of the same 

 thickness, 6-20' high; leaves narrowly linear-awl-shaped, spinulose-pointed, 

 spreading, conspicuously bristle-toothed below the middle; those of the cylindrical 

 spike with long setaceous tips. Pine-barren swamps, N. J. to Va., and south- 

 ward. Aug., Sept. Stems, including the dense leaves, $' thick ; the comose 

 spike, with its longer spreading leaves, f - 1' thick. 



# * Leaves (bracts) of the catkin-like spike scale-like, imbricated, yellowish, ovate 



or heart-shaped, very different from those of the sterile stems and branches. 

 t- Spikes sessile (i. e. branches equally leafy to the top), single. 



5. L. annotinum, L. Much branched ; stems prostrate and creeping (1 - 

 4 long); the ascending branches similar (5-8' high), sparingly forked, the 

 sterile ones making yearly growths from the summit ; leaves equal, spreading, 

 in about 5 ranks, rigid, lanceolate, pointed, minutely serrulate (pale green) ; 

 spike solitary, oblong-cylindrical, thick. Var. PUNGENS, Spring, is a reduced 

 sub-alpine or mountain form, with shorter and more rigid-pointed erectish 

 leaves. Woods; common northward; the var. on the White Mountains, 

 with intermediate forms around the base. July. (Eu.) 



6. L. Obscurum, L. Rootstock cord-like, subterranean, bearing scat- 

 tered, erect, tree-like stems dividing at the summit into several densely dichoto- 

 mous spreading branches; leaves linear-lanceolate, decurrent, entire, acute, 

 6-ranked, those of the two upper and two lower ranks smaller and appressed, 

 the lateral ones incurved-spreading ; spikes 1-10, erect, mostly sessile ; bracts 

 scarious-margined, broadly ovate, abruptly apiculate. Var. DENDRofDEUM 

 (L. dendroideum, Michx.) has all the leaves alike and incurved spreading. 

 Moist woods. Aug. Remarkable for its tree-like appearance. 



L. ALP^NUM, L., or its var. SABiN^EF6LiuM, occurs from Labrador to Wash- 

 ington, and is to be expected in northern Maine and Minn. It has slender 

 branches with rigid nearly appressed leaves. 



