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. sqnarrosiuii var. feres Schimper; S. porosum 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. subsquarrosuin \Yarnstorf). 



(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 Ungulate, the margin narrowly hyaline-bordered, the 

 broadly rounded to somewhat truncate apex erose-dentate. the 

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

 hbrillose, 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-leaves 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 

 America, in Canada and the northern United States, probably 

 distributed widely with the type form. In our region known 

 only as follows : 



