C74 LYCorODiACK.*:. (club-moss kamilt.) 



tarv, ohlong-oylindrk-al, thick. — Var. ruNOEXS, Spring', is a rctlnccd sub-alpine 

 or mountain form, with shorter and more rijjid-pointcd crcctish leaves. (Var. 

 montanum, Titrkerm.) — Wood-f : common northward: the var. on the White 

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



6. L. dendroideum, Mielix. (Grouxd-Pine.) Stems upri(jhl (6'-9' 

 high) from a subterranean creeping rootstock, simple below, and clothed with 

 homogeneous lanceolate-linear acute entire leaves appressed-ereet in 4-G rows, 

 lmsh;i-hranchc.d at the summit ; the crowded branches spreadinrj, fan-like, witli the 

 lower row of leaves shorter and the lateral spreading : — in var. onsctRU.M ap- 

 pearing flat, from the leaves of the upper side being also shorter and appresscd. 

 { L. obscurum, L.) — Moist woods. Aug. — Remarkable for its tree-like growth. 

 S])ike cylindrical, 4-10 on each plant. 



■<- -I- Spikes peditncled : i. e. the leaves minute on the fertile branches. 

 ■*-*■ Li (iirs homof/eneous and equal, manij-ranked ; stems terete. 



7. L. claVcltum, L. (Commox Club-Mos.s.) Stems creeping exten- 

 sively, with similar ascending short and very leafy branches ; the fertile termi- 

 nated by a slender peduncle (4'-C' long), bearing about 2-3 (rarely 1 or 4) 

 linear-cylindrical spikes; leaves linear-awl-shaped, incurvcd-spreading (light 

 green), tipped, as also the bracts, with a fine bristle. — Dry woods : common, 

 especially northward. July. (Eu.) 



*+ •*-'■ Leaves of two forms, fcw-ranlced : stems -or branches flattened. 



8. L. Carolinianum, L. Sterile stems and their few short branches 

 entirely creeping (leafless and rooting on the under side), thickly clothed with 

 broadly lanceolate acute and somewhat oblique 1-nei-ved lateral haves widely 

 spreading in 2 ranis, and a shorter intermediate row appresscd on the upper side ; 

 also sending up a slender simple peduncle (2' -4' liigh, clothed merely with small 

 bract-like and appresscd awl-sliapcd leaves), 6ea?-m/7 a single cylindrical spike. — 

 Wet pine-barrens. New Jersey to Virginia, and southward. July. 



9. L. COmplanktum, L. Stems extensively creeping (often subterra- 

 nean), the erect or ascending branches several times forked al.ove ; bushy branchlcts 

 croivded, flattened, all clothed with minute imbricated-appressed awl-shaped leaves in 4 

 ranlcs, with decurrent-united bases, the lateral rows with somewhat spreading 

 tooth-like tips, those of the upper and under rows smaller, narrower, wholly 

 appresscd; peduncle slender, bearing 2-4 cylindrical spikes. — Woods and thick- 

 ets : common : the typical form with spreading fan-like branches, abundant south- 

 ward ; — while northward, es])ecial!y far northward, it passes gradually into var. 

 sabix^ef6lium (L. sabina;folium, Willd. L. Chamaecypaiissus, Bruun), with 

 more erect and fascicled branches. (Eu.) 



2. SELAGINELLA, Bcauv., Spring. (PI. 20.) 



Fructification of two kinds, namely, of spore-cases like those of Lycopodium, 

 but minute and oblong or globular, containing reddish or orange-colored pow- 

 dery spores; and of3-4-valved tumid larger ones, filled by 3 or 4 (rarely 1 - 

 6) much larger globose-angular spores (oophoridlu) ; the latter cither intermixed 

 with the former in the same axils, or solitary (and larger) in the lower axils of 

 the leafy 4-ranked sessile spike. (Name a diminutive of Selago, an ancient name 

 of a Lycopodium, from which this genus is separated.) 



