L YCOPODIA CEM. T 33 



and more gradually tapering ; sporangia subglobose. Georgia, 

 Florida, Alabama, Mississippi. 



7. L. alopecuroides L. Stems 20' or more long, ly — 2 ' 

 thick, with an arching habit, rooting near the end, the ver- 

 tical peduncles arising from the arches ; air-spaces numerous, 

 densely leafy ; leaves 2^" — 3^" long, thicker than in the last, 

 lanceolate-acuminate spinulose on the sides of the stem to 

 linear-lanceolate on the upper and lower side, margin long- 

 toothed, the lower surface usually .very hairy near the base; 

 leaves of the peduncles similar; peduncles 8' — 12' long, densely 

 leafy and scarcely distinguishable from the stems ; strobiles 

 1' — 4' long, 2^" thick, when ripe with reflexed sporophylls 

 similar to the peduncular leaves but not hairy on the under 

 side, longer (5" — 6") and more gradually tapering. Long Island 

 to Florida and Mississippi, mostly near the coast. 



1 1 Sporangia transversely compressed, reniform ; sporophylls 

 entirely unlike the foliar leaves. 



\ Leafy stems short, prostrate, leaves lying nearly in one 

 plane, none beneath. 



8. L. Carollnianum L. Stems 6" — 4' long, slender, pros- 

 trate, pinnately branching, rooting occasionally from the under 

 side; leaves strongly dimorphic, the apparently lateral ones 

 large, ovate-lanceolate, falcate, recurved, broadest below the 

 middle, with a midrib asymmetrically placed, thin, entire, 

 acute ; leaves of the upper side smaller, subulate with a broad 

 base ; leaves of the peduncles reduced to small subulate more 

 or less appressed bracts ; peduncles long, 2' — 11' long, slender 

 with few usually whorled or scattered bracts ; strobiles 6" — 2' 

 long with sporophylls triangular or somewhat contracted above 

 the base, entire or erose margins ; sporangia subglobose. New 

 Jersey to Florida and Mississippi. 



\ Stems with abundant erect or ascending leafy branches. 

 II Aerial portions dendroid. 



9. L. obscurum L. (Ground-pine.) Horizontal stems 

 extensively creeping underground, giving off single vertical 

 stems which by repeatedly branching produce a bushy mass of 

 foliage, s'— 10' high; leaves spreading and upwardly curving, 



