812 Obdeb 158.— LTCOPODIACEjE. 



3 Ii. sabinsefdlium "Willd. Ground Pie. St. elongated, creeping; tranches 

 erect, short, dichotomoas, with fastigiate divisions; Ivs. imbrichied and iramijies 

 erect, terate-subulate, spikes peduneled by the attenuated and slightly leafy sum- 

 iiiits of the branches, cylindrie, solitary, with cordate, acuminate bracts. — ^White 

 Mts. and Brit. Am., creeping among rocks, with erect, numerously divided branches, 

 a few of the divisions terminating in spikes an inch in length. July. (L. chamas- 

 cyparissus Braun.) 



4 L. CaroliniSnum L. Southeen GrROUND-PmB. St. and branches a-eeping ; 

 Ivs. lanceolate, entire, appearing 2-ranked, the lateral rows spreading with 

 the 2 intermediate rows appressed ; peduncle erect, solitary, elongated, bearing a 

 single spike; bracts sublanoeolate, entire. — In muddy grounds, N. J. to Ga. Both 

 the stem and its branches are prostrate, with erect, slender peduncles 3 — 6' high. 

 July. 



5 L. dendroideum Michx. Tree Club Moss. Geoujtd Pine. St. erect; 

 branches alternate, crowded, dichotomous, erect ; Ivs. linear-lanceolate, in 6 equai 

 rows, spreading ; spikes several or many, 1 on each branchlet. — An elegant little 

 plant, common in wood.?, readily distinguished by its upright, tree-like form. Plant 

 about 8' high, with branches more or less diverging. These are subdivided into 

 numerous, forked branchlets, radiant, so as together to represent a spiral arrange- 

 metit. Spikes 2 — 6, an inch long. July. 



fi. OBSOURUM. (L. obscurum L) Branches spreading ; spike one. 



6 L. annotinum L. Interrupted Club Moss. St. creeping; branches twice 

 dichotomous, ascending; Ivs. in 5 rows, linear-lanceolate, mucronate, spreading 

 and serrulate near the tip; spike oblong, solitary. — In mountain woods, N. Eng., 

 Can. Branches subdivided near their base, branchlets simple, 4 or more, 6—8' 

 high. Leaves at length reflexed at end. Spike rather cylindrie, an inch in 

 length, distinct from the branch. July. 



7 L. aropecuroidea L. Fox-tail Clue Moss. St. creeping, subramous; 

 branches simple, long, ascending, bearing a single sessile spike at top ; Ivs. linear- 

 subulate, ciliate-dentate at base, spreading ; spike leafy. — Swamps, K. J. to Fla. and 

 La. Stem extensively creeping. Branches 6 — 16' high, rarely subdivided, densely 

 clothed with a fine, soft fohage. Spike 1 — 2' long, very leafy. Aug. 



8 L. inundktum L. Marsh Club Moss. St. creeping, often submersed; 

 branches simple, solitary, erect, with a single leafy spike at top ; Ivs. linear, scat- 

 tered, acute, entire, curved upwards. — In swamps. Can. to Car. Spikes ■§ — 1' long, 

 at the summit of branches which are 5 — 1' long, arising from the base of the stem. 

 Bracts of the spikes leaf-like, dilated at base, spreading at the end, larger than 

 the stem leaves which are 1 — 2" long. July. 



9 Ii. lucidulum Mx. Shinins Club Moss. St. ascending, dichotomously 

 dividea ; Ivs. in 8 rows, linear-lanceolate, denticulate, shining, spreading, or a little 

 reflexed; sporai!^es in the axils of leaves not changed nor crowded into a spike. — 

 In svef, woods, U. S. and Can. The foliage of this species is dark green and 

 shining, more ample than is common to the genus. Stems 8 — 16' long, nearly 

 erect. Loaves 3 — 5" long, distinctly serrate. Thecae hemispherical or reniform, 

 in the axils of the leaves near the top of the stem. Jl. 



10 L. Seiago L. Pin Club Moss. St. erect, dichotomously and fastigiately 

 branched; Ivs. scattered, imbricate, lance-linear, entire, rigid and pungent, but 

 awnless. — A smaller species than the last," found on the summits of the "White 

 Mts. Stems 2 to 6', branches compact, densely clothed with stiff, .shining, spread- 

 ing leaves arranged somewhat in 8 rows and 2 — 3" in length. Sporanges axil- 

 lary. Aug. 



2. SELAGINEL'LA, Spr. Dwarf Club Moss. Fruits of two kinds, 

 viz., antheridia, which are 1-celled, opening at apex; and oophoridia 

 containing 1 to 4 (rarely 6) globous angular grains. — Habit various. 

 Spikes quadrangular. Bracts in 4 rows. (Lycopodium L.) 



i Leaves nil alike, many ranked, surronnding the stem Nos. 1 2 



§ Leaves 4-i-anked, those of the lateral rows much larger Hos. S, 4 



1 S. nip^stre Spr. Stems in dense, branched Jufts, ascending, subdivided; Ivs. 

 scattered, imbricate, linear-lauoeolate, capillaceous-acmninate, ciliate; spike soli- 



