Sphagnum.] SPHAGXACE^. 21 



Spliag, 42, t. 6 ; Lindb. Sphag. 22. S. moUuscum, Bruch. ; 

 Scbimp. Torfm. 71, t. 21. 



Hab. Peat bogs; rare. Southern New Jersey {Austin); Canada 

 (Fowler); Cascade Mountains, Oregon (Newberry). 



§ 6. Cymbiformia. Plants robust : stem-leaves large, Ungulate 

 or spatulate ; branch-leaves very concave, densely imbri- 

 cate : cortical cells large, fibrillose and porose : ducts thick- 

 loalled, somewhat triangular, medial or near the concave 

 surface of the leaf. 



19. S. cymbifolium, Ehrh. Dioecious, densely cespitose 

 when growing out of water, rarely floating, yellowish green or 

 purplish ; stems solid, simple or 2-parted, the cortical cells in 3 

 or 4 layers ; branches in fascicles of 3 to 5, two of them pen- 

 dent, the rest curved : stem-leaves generally reflexed. Ungulate, 

 rounded and erose at the apex, not margined, the utricles mostly 

 empty or thinly fibrillose toward the apex ; branch-leaves 

 broadly ovate, narrowed and cucullate toward the apex, sca- 

 brous on the back by the perforation of the utricles, which are 

 lai'ge and fibrillose, with few large 23ores, the ducts medial and 

 narrowly oval ; perichtetial leaves small, ovate-lanceolate : cap- 

 sule large, globose, dark-brown, stomatose : spores ferruginous : 

 male plants slender, the aments rather thick, yellow. — Hannov. 

 Mag. 1780, 235 ; Schimp, Torfm. 69, t. 19 ; Braithw. Sphag. 

 38, t. 5. S. palustre,JAnn.; Lindb. Sphag. 16. S. latifolium, 

 Hedw. S. vulgare, Michx. Fl. ii. 285. 



Hab. Bogs and mountain rivulets ; common and variable. 



20. S. papillosum, Lindb. Much like the last and gen- 

 erally confounded with it. Cortical cells quadrangular, in four 

 layers : stem-leaves rounded and minutely fringed at the apex ; 

 branch-leaves round-ovate, the ducts densely and minutely 

 papillose where in contact with the utricles which enclose them ; 

 perichaBtial leaves oblong, plicate, the utricles empty in the 

 lower part, porose and fibrillose above. — Act. Soc. Sc. Fenn. 

 X. 280, and Sphag. 14 ; Austin, Muse. Appal. Exsicc. Suppl. 

 n. 451 ; Braithw. Sphag. 35, t. 4. 



Hab. New Jersey (Austin); Canada (Fowler); Pennsylvania [E. A. 

 Bau). 



21. S. Austini, Stilliv. Pale green, resembling the last 

 two species in size and aspect, differing especially in the stem- 

 leaves distinctly fimbriate, with the utricles porose and fibrillose 



