Jennings: Manual of Mosses — I. Sphagnales 37 



More or less intermediate between S. inundatum (Russow) Wamstorf, 

 and. S. auriadatum Schimper, and of doubtful status. Heretofore reported, 

 so far as known to the present writer, only from Europe, where it occurs in 

 swampy meadows. 



Centre Co.: Bog in sink-hole in pine-barrens near Srotia, July 17, 1909. O.E.J, 

 (figured). 



Subsection VI. Acutifolia 

 Branch-leaves small to medium size, lanceolate to lance-ovate, acute to 

 narrowly acute and truncate apex, their chlorophyllose cells in cross-section 

 triangular or elliptic-trapezoidal, nearer to and more or less widely exposed 

 on the ventral (inner) side and sometimes narrowly exposed dorsally between 

 the bulging hyaline cells. 



18. Sphagnum fimbriatum Wilson 



Plate VI 



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 0.7-0.8 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 crr« 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 considerably beyond them on the dorsal 

 face; cuticular cells of branches without distinct necks; perichaetial 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 borders of streams, 

 Europe, Asia, South America, and, in North America. frr>m the Arctic regions 

 through Canada to the northern part of the United States. 



Now known from the following counties- Butler, Clearfield, Crawford, Erie, Elk, 

 McKean, Warren, Westmoreland and Somerset. Figured from specimen collected in 

 Pymatuning Swamp, near Linesville, June 7, 1904. O.E.J. Also Forest and Mercer counties. 

 C.M.B. 



19. Sphagnum Girgensohnii Russow 



Plate VII 

 A tall, slender, loosely cespitose, grayish green or translucent green species 

 with stems up to 10-15 cm in height. Stem in cross-section showing a cuticu- 

 lar sheath of 2-3 layers of thin-walled, non-fibrillose porose, and a zone of 



