56 LYCOPODIACEAE (CLUB MOSS FAMILY) 



part.) Pine-barrens and sandy swamps, Nantucket (Mrs. Owen, Dame, 

 Floyd), L. L, and south w. Aug., Sept. Stems, including the dense leaves, 15 

 mm. in thickness ; the comose spike, with its longer spreading leaves, 18-22 mm. 

 thick. (S. A.) 



4. L. inundatum L. Dwarf; creeping sterile stems forking, flaccid, 3-10 

 (rarely 15) cm. high, bearing a short thick spike ; sporophylls usually toothed 

 near the ovate base, their attenuate tips herbaceous, loosely spreading ; leaves 

 lanceolate or lance-awl-shaped, acute, soft, spreading, mostly entire, those 

 of the prostrate stems curving upward. Sandy shores and in sphagnum, Nfd. 

 to N. J., and north westw. to Alaska. (Eurasia.) Var. BIGELOVII Tuckerm. 

 Taller (the fertile branches 1-3 dm. high) ; sporophylls more incurved or 

 appressed, commonly somewhat stramineous, mostly entire. (L. adpressum 

 Lloyd & Underw. in part.) Sandy shores, e. Mass, to Md. 



5. L. ann6tinum L. Much branched ; stems prostrate and creeping (3-12 

 dm. long); the ascending branches similar (1-2.5 dm. high), sparingly forked 

 sterile ones making yearly growths from the summit ; leaves equal, spreading, 

 in about 5 ranks, rigid, lanceolate, pointed, minutely serrulate (pale green); 

 spike solitary, thickish-cylindrical. Open woods, Nfd. to Ot., Minn., Col., 

 Alaska, and Greenl. (Eurasia.) In exposed and alpine situations replaced by 

 var. PUNGENS Desv., a form with short thick more rigid leaves which are 

 3-4 mm. long and erectish. Nfd. to n. N. Y., and north westw. (Eurasia.) 



6. L. clavatum L. (COMMON C.) Stems creeping extensively, with similar 

 ascending short and very leafy branches ; the fertile terminated by a slender 

 peduncle (1-1.5 dm. long), bearing about 2-4 slender cylindrical spikes ; leaves 

 linear-awl-shaped, incurved-spreading (light green), tipped, as also the bracts, 

 with a fine bristle. Dry woods ; common especially north w. July. (Cosmop.) 

 Var. MONOSTA.CHYON Grev. & Hook. Spike solitary on each peduncle com- 

 monly of larger size (sometimes 8 cm. long). E. Que. to Ct. and northwestw. 

 Var. BREvisprcXxuM Peck. Spikes solitary or in pairs, very short (1.3-2.4 

 cm. long), thickish, blunt; peduncles 3-5 cm. long. Wallface Mt., N. Y. 

 (Peck). A sterile form with greatly elongated peduncles is sometimes found : 

 Taconic Mts., w. Mass. (Harrison), and Green Mts., Vt. (Kent). 



7. L. obscdrum L. Rootstock cord-like, subterranean, bearing scattered 

 erect tree-like steins dividing at the summit into several densely dichotomous 

 spreading branches ; leaves linear-lanceolate, decurrent, entire, acute, 6-ranked, 

 those of the two upper and two lower ranks smaller and appressed, the lateral ones 

 incurved-spreading ; spikes 1-3, erect, essentially sessile ; bracts scarious-mar- 

 gined, broadly ovate, abruptly apiculate. Rich woods, N. E. to Va. Passing 

 imperceptibly into 



Var. dendroideutn (Michx.) D. C. Eaton. Leaves equal, erect or incurved ; 

 branches scarcely or not at all dorsiventral, usually erect and crowded ; spikes 

 1-15. (L. dendroideum Michx. ) The more common form, in woods or on open 

 hillsides, Nfd. to N. C. and L. Superior. 



8. L. sitch6nse Rupr. Glaucous ; rootstock long, nearly superficial ; steins 

 short, numerous, erect, divided from near the base into numerous erect sub- 

 simple crowded branches (3-7 cm. high), equally leafy all round ; leaves equal, 

 few-ranked, ascending, about 2 mm. long, slender, very acute ; spikes on short 

 but usually distinct scaly peduncles ; sporophylls green with scarious erose 

 margin, the tip spreading. Coniferous woods, e. Que. and n. Me.; Mt. Katah- 

 din; Mt. Washington, N. H. (Eggleston) ; Adirondack Mts., N. Y. (Peck)', 

 n. shore of L. Superior ; Alaska. 



9. L. sabinaefblium Willd. In habit similar to the preceding ; branches 

 5-10 cm. long, flexuous, dorsiventral ; the leaves on the lower surface smaller; 

 peduncles 2-3 cm. long. Dry woods, e. Que. to Vt. ; Staten Isl., N. Y. (Buch- 

 heister) ; and L. Superior (G-. S. Miller). 



10. L. carolinianum L. Sterile stems and their few short branches entirely 

 creeping (leafless and rooting on the under side), thickly clothed with broadly 

 lanceolate acute and somewhat oblique 1-nerved lateral leaves widely spreading 

 in 2 ranks, and a shorter intermediate row appressed on the upper side ; also 

 sending up a slender simple peduncle (7-21 cm. long, clothed merely with 



