L Y CO POD I A CE^. 1 3 3 



and more gradually tapering ; sporangia subglobose. Georgia, 

 Florida, Alabama, Mississippi. 



7. L. alopecuroides L. Stems 20' or more long, \\" 2' 

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

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

 densely leafy ; leaves 2f 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 

 i' 4' long, 2i" 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. 



t t 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' n' 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. 

 \ Aerial portions dendroid. 



9. L. obscurum L. (GROUND-PINE.) Horizontal sterns 

 extensively creeping underground, giving off single vertical 

 stems which by repeatedly branching produce a bushy mass of 

 foliage, 5' 10' high; leaves spreading and upwardly curving, 



