44 A MANUAL OF MOSSES 



with about equally free and thickened faces: for the type of 

 the species the spores are stated to be yellow and about .030- 

 .035 mm. in diameter ; of the variety the spores have not been 

 seen. 



Center : Headwaters of Laural Run, Tussey Mt., above 



Shingletown, July IS, 1909. O. E. J. 

 Fayette : In pools and wet crevices in rocky bed of river 

 above falls, Ohio Pyle, September 1-4, 1906. 

 O. E. J. and G. K. J. (Figured). 



20. Sphagnum pungens Roth. 



(S. contortum var. gracile Roell). 



(Plate V) 



Rather loosely cespitose, bluish-green, when dry sub-lus- 

 trous above, yellowish or brownish below : stems rather stout, 

 often forking, in our specimens up to 6 or 7 cm. high; wood- 

 cylinder greenish or pale, enclosed in a one-layered cuticular 

 sheath which in places is unsymmetrically often two-layered; 

 stem-leaves broadly Ungulate, about 1-1.5 mm. long, at base 

 about three-fifth? as wide, somewhat auriculate, 

 the uniformly narrowly hyaline-bordered margin some- 

 what erose-fimbriate towards the broadly rounded 

 erose-dentate apex; the hyaline cells of stem- 

 leaves broad, rarely septate, distinctly fibrillose in upper 

 two-thirds of leaf, ventrally with a few indistinct pores in the 

 angles and along the sides of the cell, dorsally with numerous 

 small pores arranged in lateral bead-like rows; of the usually 

 4 fasciculate branches, two are slender and appressed-pendent 

 while the other two are horizontally divergent and recurved, 

 about 1-1.5 cm. long, the lower and median leaves of the 

 divergent branches more or less widely squarrose, the upper 

 ones imbricate so that the branch ends in a sharply acuminate 

 point; branch-leaves broadly ovate to lanceolate, large, 1.8- 

 2.6 mm. long, concave, the uniformly narrowly hyaline-bord- 

 ered margins involute towards the acuminate few-toothed 

 apex; hyaline cells of branch-leaves narrow, long, richly 

 fiWillose, ventrally with a few indistinct pores in the cell- 

 angles, dorsally with numerous small ringed pores about one- 

 fourth to one-fifth as wide as the cell and arranged in bead- 

 like rows along the sides of the cell ; in cross-section the 

 chlorophyllose cells relatively large, narrowly barrel-shaped, 

 free on both faces, the hyaline cells not being markedly con- 

 vex on either face ; cuticular cells of branches long-rectangular 

 with a short neck and a large apical pore : spores not known 

 from our region. 



A more or less intermediate species between S. inundatum 

 and S. auriculatum. Heretofore reported, so far as known to the 



