L YCOPODfA CE&. 1 3 7 



ing; fertile stems erect, simple, i' 4' high, bearing a short, 

 thick spike; leaves lanceolate or lance-awl-shaped, acute, 

 entire, soft, spreading or curved upward on prostrate stems. 

 (L. palustre Lam., Plananthus inundatus Beauv.) Forms hav- 

 ing the fertile stems 5' 7' high, with more pointed, often tooth- 

 bearing leaves, are the var. Bigelovii Tuckerm. (L. Carolini- 

 anum Bigel.) New England to Michigan and southward. 



Var. pinnatum Chapm. Stems pinnately branched ; leaves 

 bristly-fringed below the middle, unequal, the upper and lower 

 shorter and somewhat appressed, the lateral widely spreading; 

 fertile stems i high, very leafy; spike thick, cylindric, 2' 3' 

 long. Western Florida. 



4. L. alopecuroides L. Stems stout, densely leafy through- 

 out; sterile branches flaccid, procumbent, creeping; fertile 

 branches rigid, erect, 6' 20' high, bearing a single spike ; leaves 

 narrowly linear-awl-shaped, spinulose-pointed, spreading, con- 

 spicuously bristle-toothed below the middle, nerved above, 

 those of the cylindric spike with long, setaceous tips. (L. 

 longipes H. & G., Plananthus alopecuroides Beauv.) New Jersey 

 to Florida and Mississippi. 



2. EULYCOPODIUM. (LEPIDOTIS Beauv.) Sporangia 

 borne in the axils of yellowish, scale-like, imbricated, mate or 

 cordate leaves which form a distinct spike ; leaves of sterile 

 branches very unlike those of the spikes. 



* Stems leafy to base of spikes, or nearly so. 

 t Spikes nodding. 



5. L. cernuum L. Stems erect, branching, the branches 

 similar; leaves crowded, awl-shaped, incurved, terete in the 

 middle, spreading, grooved below; bracts 8-ranked. (L. mari- 

 anum Willd., L. curvatum Blume., L. Boryanum Richard, L. 

 bryifolium Vent.) Florida, Southern Alabama. 



ft Spikes erect, closely sessile. 



6. L. annotinum L. Stems much branched, prostrate, 

 creeping, i 4 long; the ascending branches similar, 5' 8' 

 high, sparingly forked ; leaves equal, spreading, five-ranked, 

 rigid, linear-lanceolate, minutely serrulate, nerved below; spike 

 oblong, cylindric, thick. {L. juniper if olitim Lam., L. bryophyl- 

 lum Presl, Lepidotis annotina Beauv.) Mountain forms with 



