32 A MANUAL OF . MOSSES 



America, from the Arctic regions to the northern part of the 

 United States. In our region reported in Porter's Catalogue 

 as follows : 



Cambria : T. C. Porter, (Porter's Catalogue). 



Huntingdon: T. C. Porter, (Porter's Catalogue). 



7. Sphagnum teres (Schimper) Aongstroem. 

 (S. squarrosuni var. teres Schimper; S. porosuin Lindberg). 

 This species is represented in our region by a plant per- 

 haps 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 rather than distinctly terete : 



7a. Sphagnum teres variety subteres Lindberg. 



{S. teres var. suhsquarrosum Warnstorf). 



(Plate II) 



Weakly and loosely but quite deeply cespitose, yellowish- 

 green to distinctly yellowish: stems up to 15 or even 20 cm. 

 long, slender, the cuticular sheath usually three-layered, the 

 outer cells perhaps a little the largest, non-fibrillose, usually 

 not distinctly porose, the wood-cylinder strong, yellowish or 

 rarely castaneous; stem-leaves large, about 1.5 mm. long, 

 broadly lingulate, the margin narrowly hyaline-bordered, the 

 broadly rounded to somewhat truncate apex erose-dentate, the 

 base often slightly auriculate ; hyaline cells of stem-kaves non- 

 fibrillose, non-porose, in the lateral portions of the basal half 

 of the leaf often septate, the upper hyaline cells about as broad 

 as long; branches 3 to 5 to a fascicle, usually two appressed- 

 pendent and very slender, the others widely divergent but 

 somewhat recurved, rather slender, about 1-1.5 cm. long; 

 branch-lea\-es when dry imbricate but with the apical half of 

 some of them squarrose, the leaves usually 1.5 mm. long, ovate, 

 concave, the narrowly hyaline-bordered margin involute to- 

 wards the apex; hyaline cells of branch-leaves short, wide, 

 both ventrally and dorsally fibrillose, and with a few large 

 round pores about half as wide as the cell and usually located 

 in the cell-angles ; in cross-section the chlorophyllose cells in 

 the apical third of the leaf trapezoidal to barrel-shaped and ex- 

 posed both dorsally and ventrally, wider on the dorsal face, to- 

 ■wards the base of the leaf sometimes triangular and exposed 

 only dorsally ; cuticular cells of branches rectangular and 

 apically porose : spores not seen but said to be brownish, papil- 

 lose, and about .025 mm. in diameter. 



In bogs, wooded swamps, etc., in Europe and, in North 

 /\merica, in Canada and the northern United States, probably 

 distributed widely with the type form. In our region known 

 only as follows : 



