LYCOPODIACEAE 



65 



Sporophylls bract-like, very unlike the foliar leaves; spor- 



anges reniform. 



Stems with numerous erect or assurgent leafy aerial 



branches, the spikes terminal upon some of these. 



Leaves of the ultimate aerial branches in more 



than five rows. 



Main stem creeping deep in the ground; 



aerial branches few, tree-like. 

 Main stem prostrate; aerial branches numer- 

 ous, not tree-like. 

 Spikes solitary, sessile. 

 Spikes solitary to several, on elongate 

 peduncles. 

 Leaves of the ultimate aerial branches in four rows, 

 adnate considerably more than half their 

 length; spikes borne upon bracteate pe- 

 duncles, these terminal upon leafy branches. 

 Ultimate aerial branches conspicuously flat- 

 tened; leaves of the under row greatly re- 

 duced, minute, deltoid-cuspidate. 

 Ultimate aerial branches narrower and less 

 flattened; leaves of the under row scarcely 

 reduced, acicular. 

 Stems without leafy aerial branches, the elongate 

 peduncles arising directly from the prostrate stem. 



6. L. obscurum. 



L. 



8. L. 



annotinum. 

 clavatum. 



9 L complanatum. 



10. L. 



11. L. 



tristachyum. 

 carolinianum. 



i. L. lucidulum Michx. In cold damp woods: Newf. to B. Col. 

 south to S. Car., Tenn. and Iowa. 



Conn. Scattered over the state. 



N. Y. Dutchess, Ulster, Greene and Delaware counties, and near 



Baldwins, L. I. 

 N. J. Rare and local in Gloucester and Camden counties, near the 



Delaware, increasing northward; not in the pine-barrens. 

 Pa. Throughout. 



Tertiary, o: Cretaceas, rare; Older Formations increasing north- 

 ward. 117-207 days. Sea level-3,365 ft. 



2. L. porophilum Lloyd & Underw. On partially shaded rocks, 



especially on sandstone: Pa. to Wise, Ind. and Ala. 



Known in our area only from Raymond's Kill Falls, Pike Co., 

 Pa., a region underlaid by shale. 



3. L. inundatum L. In sandy bogs: Newf. to Alaska, south and 



west to N. J., Pa., 111., Mich., Idaho and Wash. Also in 

 Europe and Asia. 

 Conn. Southington. 



