LYCOPODIACE.E. 445 



the margin, thus 2-valved, discharging the subtile spores in 

 tli e form of a very copious sulphur-colored inflammable .pow- 

 der. — Perennials, with evergreen 1-nerved leaves, imbricated 

 or crowded i)t % to 16, rarely in 4 ranks. 



** Spve-cases scattered in the axils cf the d irk green leaves. 



1. L. Ltjcidum, Michx. Shining Club-Moss. 



i 'thick, 2 or 3 times forked, the branches asce n ding, 6 to 12 inches high; 

 idtdy spreading or refiexed, lin »r lanceolate, acute, minutely toothed. 

 •Celd dam? woods. Aug. Leaves long, dark green aud shining. 



* * Spore-casts borne oily in the axils of the iqiper (bracteal) leaves, thus forming 

 sjpikes or amend. 



2. L. alopecuroides, L. Fox-tail Cfab-Mcss. 



Stems stoat, very d n-ely leafy throughout; the sterile branches recurred -pro- 

 cu.ub at and creeping ; th s frtiie of the same thickness, 6 to 20 inches high ; leave* 

 narrowly linear awl shaped, spinulose-poiuted, spreading, conspicuously bristle- 



1 'oth'l below the middle; those of the cylindrical spike with long bristly tips. 



Pine barrens and swamps. Aug., Sept. Stems with the dense leaves % inch 

 thick ; the coniD^e spike with its longer spreading leaves % to 1 inch thick. 



8. L. dendroideum, \liehx. Ground Pine. 



Stems upright, 6 to 9 inches high, from a subterranean creeping rootstock, sim- 

 ple below, and clothe! with lance-linear acute entire leaves, appressed-erect in 4 to 

 ti rows, bushy-branched at the summit; the crowded branches spreading, fan-like, 

 with the lower row ot leaves shorter and the lateral spreading, — in var. OBSCURCH 

 appearing flat from the leaves of the upper side being also shorter and appressed. 



-Moist woods. Aug. Remarkable -for-its treelike growth. Sj)ikes solitary, or 2 

 to 3, cylindrical. 



4. L. clavatum, L. Common Club-Moss. 



Stems creeping extensively, with similar ascending short and very leafy branch- 

 es; the fertile terminate! by a sleuder peduncle 4 to 6 inches long, bearing about 



2 or 3 (rarely 1 or 4) linear-cylindrical spikes ; leaves linear-awl-shaped, incurved- 

 spreading, light green, tipped as also the bracts with a fine bristle. 



Dry woods, common. July. 



5. L. complanatum, L. Flattened Club-Moss. 



St j ms extensively creeping (often subterranean), the erect or ascending branches 

 several times forked above; branchlets equal, crowded, spreading, somewhat fan- 

 like, flatteued, all clothed with minute imoricated-appressed awl-shaped leaves in 

 4 ranks, with decurrent-uuited bases, the lateral rows with 6lightly spreading 

 tooth-like tips, those of the upper and under rows smaller, narrow, wholly &JK 

 .pressed ; peduncles slender, bearing 2 to 4 cylindrical spikes. 



•Dry woods and copses, common. J uly. 



2. SELAGINELLA, BeatiV., Spring. 



Name a diminutive of Selago. 



Fructification of two kinds, 1-celled, some filled with 

 minute powdery matter, and opening at the apex; otheri 

 containing 1 to 4, rarely 6 globose angular grains ; the latter 

 either intermixed with the former in the same axils, or soli- 

 tary in the lower axils of the leafy 4-ranked sessile spike. 



»1. S. rupestris, Spring. Small Rock Club-Moss. 



Much branched in close tufts, 1 to 3 inches high: kavtt deosely apprewei is? 



W2 



