OF WESTERN PENNSYLVANIA. 35 



Blair : Springy mountain slope, Rhododendron Park, 

 Lloydsville, October 18, 1901. J. A. S. (Figured). 



10. Sphagnum fimbriatum Wilson. 

 {Sphagnum suhulatum Bruch). 



(Plate III) 



Loosely cespitose, grayish-green to yellowish-brown : 

 stems rather slender, usually 4—5 cm. high, sometimes much 

 longer, in cross-section showing a cuticular sheath of 2-3 

 layers of cells, the cells of the outer layer largest and porose; 

 stem-leaves very widely obovate-spatulate, about 0.7-1.0 mm. 

 long, wider above up to 0.6-0.8 mm., the upper half broadly 

 rounded and erose-fimbriate ; hyaline cells of stem-leaves non- 

 fibrose, non-porose, very wide above the middle of the leaf, 

 towards the base often one- to several-septate, the hyaline 

 border towards the base widening to about one-third the width 

 of the leaf on each side; fasciculate branches 3 or 4, usually 

 two slender, arcuate, and decurved, and up to 2.5 cm. long, the 

 other one or two pendent, rather closely appressed to the stem, 

 filiform; branch-leaves closely imbricated, shortly ovate- 

 lanceolate below to slenderly lanceolate above, concave, the 

 upper margin incurved, the apex narrowly truncate and 

 dentate ; hyaline cells rather small with four to six fibrils, 

 ventrally with a few round pores which are often almost as 

 wide as the cell, dorsally with more numerous lateral pores 

 above one-third as wide as the cell ; in cross-section the 

 chlorophyllose cells trapezoidal, free on both surfaces, the inner 

 surface widest, the hyaline cells extending convexly consider- 

 ably beyond them on the dorsal face ; cuticular cells of branches 

 without distinct necks ; perichsetial leaves large, obtusely 

 ovate : spores stated to be smooth, yellowish-brown, about 

 .025-.030 mm. in diameter. 



Usually in low-lying bogs and marshes, or along the bor- 

 ders of streams, Europe, Asia, South America, and, in North 

 America, from the Arctic regions through Canada to the north- 

 ern part of the United States. Apparently rare in our region. 



Crawford : Pymatuning Swamp, near Linesville, June 7, 

 1904. O. E. J. (Figured). 



11. Sphagnum warnstorfii Russow. 



{S. acntifolhun var. gracilc Russow). 



In swampy meadows, margins of bogs, etc., in Europe 

 and, in North America, from Newfoundland to Pennsylvania 

 and westward to the Pacific States. The species varies from 

 bright green to yellowish or from red to purplish. Only the 

 green variety has thus far been found in our region, its char- 

 acters being as follows : 



