L YCO PODIA CE&. 1 39 



Beauv.) North Carolina to Canada and westward to Washing- 

 ton Territory and Unalaska. 



ft Leaves of two forms, few ranked; stems flattened. 



11. L. Carolinianum L. Sterile stems and their few short 

 branches entirely creeping; lateral leaves broadly lanceolate, 

 acute, and somewhat oblique, one-nerved, widely spreading in 

 2-ranks ; upper row of leaves shorter, appressed ; peduncle 

 simple, slender, 2' 4' high, clothed with small bract-like leaves, 

 bearing a single cylindric spike. (L. repens Swz., L^affine Bory., 

 Lepidotis repens Beauv.) New Jersey to Florida, Alabama, and 

 Louisiana. 



12. L. complanatum L. Stems extensively creeping, 

 with erect or ascending fan-like branches several times forked 

 above; branchlets crowded, flattened; leaves minute, imbri- 

 cate-appressed, 4-ranked; the lateral rows with somewhat 

 spreading tips; the intermediate smaller, narrower, and wholly 

 appressed ; peduncle slender, bearing 2 4 cylindric spikes. 

 (L. thyoides Humb. & Bonpl., L. tristachyon Pursh, L. anceps 

 Wallr., L.chamcecyparissus A. Br. , Lepidotis complanata Beauv.) 

 North Carolina to New England, Michigan, and northward. 



II. PSILOTUM R. Br. 



Perennial plants, terrestrial or growing on trees. Stems di- 

 chotomously-branched with minute alternate leaves or appar- 

 ently leafless. Sporangia sessile, 3-celled, opening at the apex 

 into 2 3 valves. Spores farinaceous, oval or elongate-reniform, 

 Name from Gr. t/>/Ao?, naked, alluding to the abortive leaves. 

 Contains four species, mostly tropical. 



i. P. triquetrum Swz. Stems erect, 8' 10' high, triquet 

 rous at base, many times forked at apex ; ultimate divisions tri- 

 quetrous-winged ; leaves remote, awl-shaped, less than i" long; 

 sporangia in spikes. (P. Floridanum Michx., P. dichotomum 

 Link., Bernhardia dichotoma Willd., B. pedunculata Desv., 

 Lycopodium nudum L.) Eastern Florida ; Bluffton, South Caro- 

 lina ( MellichamJ>)* 



