JtNNiNGS: Manual of Mosses — I. Sphagnales 35 



concave and more or less cucullate; hyaline cells of the stem-leaves broad above, 

 usually all non-fibrillose, rarely a few septate, sometimes porose; of the 3-5 

 fasciculate branches two or three are variously divergent, short, usually 6-8 mm 

 long, slender and sometimes flagelliform; branch-leaves small, 1-1.5 mm long, 

 very concave, broadly ovate to lanceolate, acuminate to a narrowly 

 truncate or 3-5 toothed apex the margins uniformly narrowly hyaline- 

 bordered, involute, when dry closely imbricate to more or less sub-secund; 

 hyaline cells of branch-leaves narrow, richly fibrillose, ventrally non-porose, 

 or with a few small non-ringed pores in the cell-angles, dorsally with numerous 

 small ringed pores along the sides of the cells; in cross-section the chlorophyl- 

 lose cells narrowly barrel-shaped, relatively rather large as compared with the 

 hyaline cells, free on both faces, the hyaline cells but slightly convex on either 

 side: spores not seen from our region, finely papillose, yellowish, and .025-.028 

 mm in diameter. 



In wet meadows, swamps, ditches, bogs, etc., in Europe and in Asia and, 

 in North America, from Newfoundland to Alabama. In our region frequent; 

 approaching the variety brachycladum Warnstorf in having stem-leaves more 

 or less cucullate and the divergent branches often only about 5 mm long. 



Erie Co.: In bog ac south end of Cranberry Pond, Presque Isle. May S-'), 1906. 

 O.E.J, (figured). Also known from Elk, Centre, Clarion, Clearfield, Mercer, Butler, 

 Westmoreland, Fayette, Somerset, and Bedford counties, but not known from the south- 

 wfcstern border counties. 



16. Sphagnum inundatum Russow, Warnstorf 

 Densely and deeply cespitose, gray or yellowish-green: stems usually 15-30 

 cm long, more or less completely submerged; branches with moderately 

 densely imbricate leaves; stem-leaves usually somewhat fimbriate at the narrow 

 apex, little or not at all auriculate, fibrillose only above the middle; branch- 

 leaves dorsally richly porose in lateral bead-like rows, ventrally with only a 

 few pores located in the cell-angles. Other characters are as described for 

 the variety auriculatiim. 



In wet meadows, wooded swamps, bogs, etc. In cooler Europe, Asia, and 

 North America. In our region, so far as now known, represented only by 

 the following variety. 



16a. Sphagnum inundatum var. auriculatum (Warnstorf) Roth 



{S. contortum var. laxutn Roell) 

 Plate IX 

 Only moderately cespitose, green: stems in our specimens only about 6-8 cm 

 high, only occasionally completely submerged; wood-cylinder greenish, sur- 

 rounded by a cuticular sheath of one layer (ossacionally unsymmetrically two) 

 of inflated more or less distinctly porose cells; stem-leaves 1.2-1.5 mm long, 

 about three-fifths as wide, distinctly auriculate, towards the apex somewhat 

 concave, the margins narrowly uniformly hyaline-bordered and toward the 

 ap>ex involute, the narrow apex somewhat dentate but not fimbriate; the 

 hyaline cells of stem-leave.« broad, towards the lateral portions of the base 

 becoming narrower, usually septate, fibrillose at least as far down as the 



