16 SPHAGNACE^. [Sphagnum. 



§ 3. Squarrosa. Plants stout: branch-leaves sqnarrose from 

 the middle: ducts medial, oval, inflated and free on both 

 sides, or covered by the borders of the utricles on the upper 

 surface of the leaves : cortical cells not porose. 



8. S. squarrosum, Pers. Monoecious, loosely and broadly 

 cespitose, bluish-green : sterns solid, rigid, simple or forking, 

 with small cortical cells in two layers ; branches in fascicles 

 of 3 to 6 : stem-leaves soft, spreading or reflexed, linguiform, 

 rounded and fimbriate at the a})ex, the utricles without fibres or 

 pores ; branch-leaves oblong-lanceolate, 4-toothed at the apex, 

 broadly margined by 2 or 3 rows of narrow cells, the xitricles 

 fibrillose and with some large pores on the borders ; pericha^tial 

 leaves very broad, subrevolute, thin, rounded at the apex: 

 capsules numerous at and near the capitate apex, large, globose: 

 spores yellow. — Schimp. Torfm. t. 17; Braithw. Sphag. 59, 

 t. 14 ; Lindb. Sphag. 42. 



Var. squarrosulum, Schimp. Plants pale, with slender 

 stems : leaves scarcely half as large as in the normal form : fruit 

 unknown. — Torfm, 71. S. squarrosidum, Lesq. Mem. Calif. 

 Acad. i. 3. 



Hab. Boggy places in woods; not rare. The variety in open moun- 

 tain bogs; on Lassen's Peak, California, at about 5,000 feet altitude, 

 forming by itself large bogs ( W. U. Brewer). 



9. S. teres, Angstroem. Dioecious, loosely cespitose, yellow- 

 ish brown ; male plants in separate tufts, more slender than the 

 female, with subglobose heads composed mostly of short flower- 

 bearing branches : stems solid, with 2 to 4 cortical layers of un- 

 equal cells: stem-leaves large, oblong-ovate, rounded at the 

 erose apex, the utricles empty ; branch-leaves closely imbricate, 

 ovate, abruptly short-acuminate, recurved at the obscurely den- 

 tate apex, the utricles fibrillose and poi'ose ; perichaetial leaves 

 large, concave or subrevolute, erose at the rounded apex : cap- 

 sule terminal, globose. — Sulliv. Icon. Muse. Suppl. 13, t. 4; 

 Schimp. Syn. 2 ed., 836. S. squarrosum, var: teres, Schimp. 

 Torfm. 64 ; Braithw. Sphag. 62, t. 15. 



Hab. Marshes in Southern New Jersey [Austin); rare. 



10. S. Wulfianum, Girgens. Monoecious, large, rigid, 

 brownish-green, the apex variegated green and red : stems dark- 

 brown ; cortical cells small, in 2 layers ; branches 7 to 14, half 

 of them subarcuate or horizontal, tumescent, the rest slender, 



