Jennings: Manual of Mosses — I. Sphagnales 29 



Centre Co.: At margin of pond under Pinus rigida. "Barrens," near Scotia. Sept. 

 22, 1909. (O.E.J, (figured). Erie Co.: In black ash swamp at head of Conneautte 

 Lake. Edinboro. O.E.J, and J. C. Fetterman. June 2?, 1919. Westmoreiand Co.: 

 Laurel Hill Mt.. 9 mi. s.e. of Rector. Hugh Mozingo. Oct. 7, 1945. 



Subsection III. Squarrosa 



Branch-leaves squarrose-spreading, their chlorophyl'ose cells in cross-section 

 trapezoidal to rectangular or barrel-shape, or triangular towards leaf-base, 

 dorsally more widely exposed, thick-walled, their hyaline cells with large pores. 



8. Sphagnum squarrosum [Persoon] Schwaegrichen 



Plate LXX 



Loosely cespitose, bluish- to yellow-green: stems long, loosely branched, 

 with wood-cylinder hyaline to greenish or yellowish, cuticular sheath distinctly 

 2- (3) -layered; stem-leaves broadly oblong-lingulate, the ape.x broadly rounded 

 and erose-fimbriate, the leaves very narrowly bordered, slightly auriculate, non- 

 fibrillose, the hyaline cells above short and broad; branches 4 or 5, two or three 

 tumid, horizontal, the leaves on the lower two-thirds of the divergent branches 

 with squarrose tips; branch-leaves lanceolate to lance-ovate, very concave, 

 acuminate, with involute margins and usually slightly erose, marginal cells 

 narrower, but not usually forming a hyaline border; hyaline cells of branch- 

 leaves richly fibrillose, on both sides with numerous large round pores of about 

 one- fourth to one-third the width of the cell; in cross-section the chlorophyllose 

 cells free on both surfaces, narrowly rectangular to trapezoidal, when trape- 

 zoidal with the wider face dorsal, the faces thick-walled, the lumen more or 

 less elliptic, the hyaline cells strongly convex on both surfaces: spores yellowish 

 and finely roughened, about .022-. 025 mm in diameter. 



In usually shaded locations in swamps, boggy springs, along woodland 

 streams, etc., in Europe, and, in North America, from the Arctic regions to 

 the northern part of the United States. 



Now known from the following eight counties in the northwestern and mountainous 

 parts of our region: Cambria, Carion, Elk, Erie, Huntingdon, McKean, Mercer, and 

 Somerset. Fipured from a specimen collected in a wooded swamp m Cook Forest, by Adam 

 M. Barker. Sept. 15. 1935. 



9. Sphagnum teres (Schimper) Aongstroem 



(S. squarrosum var. teres Schimper; S. porosum Lindberg) 



This species is represented in our region by a plant in varying degrees 

 p>erhaps best regarded as the following variety, which differs from the typical 

 form of the species mainly in having the divergent branches more or less 

 squarrose-leaved rather than distinctly terete. 



9a. Sphagnum teres var. subteres Lindberg 



(.$". teres var. subsquarrosum Warnstorf) 

 Plate III 



Weakly and loosely but quite deeply cespitose, yellowish-green to dis- 

 tinctly yellowish: stems up to 15 or even 20 cm long, slender, the cuticular 



