ORDER CXLH. LYCOPODIACILE CLTJB-MOSS-FAMTLY. 



223 



3. L. obscurura. 



Spreading Club-moss. 



Stem erect, clothed by the linear-lanceolate leaves in 4 6 nnequal rows ; 

 branches spreading, flat, the leaves on the upper side being shorter and ap- 

 pMMd ; spikes 13, sessile, cylindrical. A common species in damp woods, 

 distinguished from the last, which it much resembles, by the spreading, almost 

 horizontal, flat brandies. Stem 6' S' high. Aug. 



4. L. clavatum. Ground Ivy. 



Stems creeping, with short, ascending, densely leafy branches; leaves 

 linear-subulate, mucronate, spreading, curved upward ; spikes 2 3, apparently 

 pedunculate ; the leaves on the very slender foot-stalk being minute and un- 

 consplcnous. A common trailing evergreen, found in dry woods, distinguished 

 by Its long, creeping stem, and short, ascending, densely leafy branches. July. 



5. L. complanatnm. Ground Pine. 



Stem creeping; branches erect, ascending, compressed, dlchotommis ; 

 kranchlcts numerous, spreading, almost horizontal, compressed ; leaves minute, 



appressed, subulate, In 4 unequal rows, united by their decnrrent base ; mar- 

 ginal row with slightly spreading tips; the other rows entirely appressed; 

 spikes 2 6, cyltndric, pedunculate. A trailing evergreen, frequent in moist 

 woods, where it forms large beds. July. 



2. SELAODrtlLLA. 



Sporangia of 2 kinds, the first are very minute, 1-celled, and 

 opening by 2 transverse valves; the other kind larger, 3 6- 

 valved, and containing much larger spores. These 2 kinds are 

 either found in the same axils, or the larger are separate, in the 

 lower axils. 



1. S. rupestris. Bock Club-moss. 



Stem creeping, with many tufted branches ; branches ascending, densely 

 clothed with the scattered, linear-lanceolate, imbricated, appressed, grayish, 

 mucronate leaves ; spike leafy, 4-angled, with both kinds of sporangia in the 

 same axils. A grayish, moss-like plant, on rucks, of a somewhat stunted, dried 

 up appearance. Stems 2' 8' long. July. 



