36 A MANUAL OF MOSSES 



lie/. Sphagnum warnstorfii variety virescens Russow. 



(Plate III) 



Rather densely cespitose, bright green above, bleached or 

 yellowish below: stems in our specimens from about 5-12 

 cm. high, the wood-cylinder green to red and surrounded by 

 a cuticular sheath of three layers of inflated cells, the middle 

 cells usually being the largest; stem-leaves about 1 mm. long, 

 broadlv lin^ulate, not auriculate, rather abruptly rounded to 



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a narrowly erose-dentate somewhat concave apex, the margin 

 very broadly hyaline-bordered below but abruptly narrowing 

 above and continuing rather narrow to the apex ; hyaline cells 

 in upper half of stem-leaf broad, many of them once (or twice) 

 septate, in the lower half of leaf the hyaline cells broad only 

 in a narrow median strip flanked on both sides by narrow 

 elongate cells, usually all hyaline cells of stem-leaf non- 

 fibrillose and non-porose ; fasciculate branches usually 4, two 

 very slender and closely appressed-pendent, and two hori- 

 zontally divergent, rather slender, somewhat recurved, about 

 1-1.5 cm. long, the comal branches short, obtuse, ascending 

 to erect ; branch-leaves rather indistinctly five-ranked, when 

 dry with more or less spreading tips, ovate-lanceolate, con- 

 cave, 1.5-2.0 mm. long, the margins uniformly narrowly hya- 

 line-bordered and involute to the quite narrowly acuminate 

 and truncate-erose apex ; hyaline cells of branch-leaves richly 

 fibrillose, ventrally with one or two large round median pores 

 of one-half to two-thirds the width of the cell, these pores 

 usually more numerous towards the margin of the leaf, 

 dorsally with quite numerous, small, elliptic, ringed pores in 

 the angles and along the sides of the cell ; in cross-section the 

 chlorophyllose cells narrowly trapezoidal with the ventral face 

 wider, both faces usually free, sometimes enclosed dorsally, 

 the hyaline cells being dorsally quite convex; the cuticular 

 sheath of branches with long rectangular cells with indistinct 

 necks and apical pores: spores for the species stated to be dark 

 yellow, minutely roughened, and about .025-.030 mm. in 

 diameter. 



In our region known onlv from one locality, as follows : 



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Mercer : Xear Houston Junction, July 12. 1902. J. A. S. 

 (Figured). 



12. Sphagnum quinquefarium ( Lindberg) Warnstorf. 

 (Sphagnum acutifolium var. quinquefarium Lindberg). 



(Plate III) 



Pale green or yellowish-green, mostly more or less rose- 

 tinted above, but in our region not rose-tinted so far as yet 

 known, deeply and densely cespitose: stems up to 10 cm., 

 often forking, densely fasciculately branched, in cross-section 



