34 American Midland Naturalist Monograph No. 6 



spreading branches more or less sub-secund; spores stated by Warnstorf to be 

 .023-.028 mm in diameter, yellowish and finely papillose. 



In turfy swamps and bogs in Europe and North America, extending in 

 the latter country from Massachusetts to Louisiana, also to Ohio. 



Butler Co.: Open swampy pasture, Crider's Corners, Apr. 26, 1908. O.E.J. 



14. Sphagnum auriculatum Schimper 



(S. Gravetti Russow, p.p. — Warnstorf; S. subsecundum var. intermedium Warnstorf) 



Plate V 



Densely cespitose, grayish or glaucous green, light yellow below; stems 

 rather short (In our specimens about 5 cm), densely branched; branches in 

 fascicles 3-5, two or three of these drooping from a horizontally spreading base, 

 terete and rather thick, up to 1 cm long, the other one or two slender, and 

 rather closely appressed to the stem; in cross-section the cortical cells distinct, 

 in one layer, the outer cells of- the central axis much thickened and small; 

 stem-leaves large, 1.5-2.0 mm long, about half as wide, concave, from the dis- 

 tinctly auriculate base oval- Ungulate, the rounded apex narrowly toothed, some- 

 what cucullate, the margin narrow and of equal width from base to apex; cells 

 of the stem-leaves fibrillose to the base or nearly so, only rarely septate, ven- 

 trally with rather large poorly defined pores in the cell-angles, rarely none, 

 dorsally with numerous distinct pores along each side of the cell, the pores 

 circular to elliptic and about one- fourth the width of the cell; retort cells of 

 the branches with a distinct neck and terminal pore; lower branch-leaves large, 

 about 2 mm long, widely ovate, about 1.5 mm wide, very concave, the margins 

 more or less involute, the apex somewhat spreading, narrowly toothed, the 

 upper leaves more closely imbricated and lanceolate; cells of branch-leaves 

 ventrally with rather few large indistinct angle-pores, dorsally with numerous 

 distinct pores in a row along each side, as in the stem-leaves, the hyaline cells 

 usually with 8-10 spiral fibrils, the border of 2-4 thick-walled, linear-prosenchy- 

 matous cells; chlorophyllose cells in cross-section barrel-shaped with both 

 ends exposed: fruit unknown 



In wooded swamps and wet shaded places, Europe and North America. 



Known from the following collections in our region. Fayette Co. : Near Seaton's 

 Lake. Hugh N. Mozingo. April 7, 1946; and in wet cavities ini rocks, Ohio Pyle near 

 Falls, O.E.J., June 14, 1908 (figured). Somerset Co.: Shafer Run, 2 mi. n. of Baker- 

 vilie, Hugh N. Mozingo, Sept. 14, 1946. Venango Co.: Near Lisbon, Mrs. E. J. 

 Mason. Oct., 1947. Westmoreland Co.: Springy hillside, Mellon estate, "Rachel- 

 wood," New Florence, Sept. 9-11, 1907, O.E.J. 



15. Sphagnum subsecundum Nees 



Plate IX 

 Moderately densely cespitose, green to yellowish or brownish: stems 5-20 

 cm long, with a dark or purplish-brown wood cylinder, with a cuticular sheath 

 of one layer of moderately inflated cells; stem-leaves small, about 0.6-0.8 mm 

 long, broadly short-lingulate, somewhat auriculate, the margin broadly hyaline- 

 bordered below, the border narrowing and becoming fimbriate towards the 

 broadly erose-fimbriate apex, the upper half of the stem-leaves often distinctly 



