Jhnnings: Manual of Mosses — I. Sphagnai.es 4i 



triangular lingulate, the apex erose-truncate and toothed, the hyaline border of 

 margin narrow above, very wide below; hyaline-ceils of stem-leaves broadly 

 rhomboidal towards the apex and in median basal portion of leaf, towards 

 lateral basal portions rapidly much narrower and septate, all non-fibrillose and 

 non-porose; branches 3-5 in a fascicle, usually two of these variously divergent, 

 rather slender, terete, about 1-1.5 cm long, the others very slender and ap- 

 pressed-pendent; branch-leaves ovate, concave, about 1.5 mm long, the nar- 

 rowly hyaline-bordered margin towards the apex involute, the blade towards 

 the apex gradually narrowed towards an erose-dentate point, the leaves when 

 dry imbricate with more or less of a metallic lustre, not distinctly 5 seriate; 

 hyaline cells of branch-leaves fibrillose, rather broad, ventrally with usually 

 two or three median, large, round, ringed pores about one-third to one-half as 

 wide as the cell, occasionally a few pores also in the cell-angles, dorsally with 

 about 6-10 elliptic pores about one-third as wide as the cell and situated along 

 the sides and angles of the cell; in cross-section the chlorophyllose cells small 

 and shortly sub-rectangular to triangularly trapezoidal, situated much nearer 

 the ventral leaf-surface with the wider ventral face free, the narrower dorsal 

 face free or enclosed between the dorsally highly convex hyaline cells; cuticular 

 cells of branches inflated, short, with a distinct neck and terminal pore: spores 

 stated to be yellow, papillose, about .025- 030 mm in diameter. 



In bogs, swamps, etc., widely distributed in the cooler parts of the 

 Northern Hemisphere, in North America occurring from Greenland and 

 Labrador south to New Jersey and Pennsylvania, and in Cal-fornia and Brit- 

 ish Columbia. In our region apparently represented only by the following 

 variety, more properly a form, as follows: 



23a. Sphagnum plumulosum f. viride (Warnstorf) 



New Combination 



(S. subnitens var. viride Warnstorf) 



Th:s form differs from the typical species in that the tufts are low and 

 entirely green or often bleached out below. 



In deep, shaded swamps and bogs within the range of the type. 



Crawford Co.: Shaded boggy margin of Mud Lake, Hartstown, May 29-31, 1909. 

 O.E.J, and G.K.J, (figured). 



24. Sphagnum acutifolium Ehrhardt 



(5. capillifolium (Ehrh. ) Russ. Sl Wamst.; S. capillaceum (Weiss) Schrank) 



The typical form of this species has green to pale or variously reddish to 

 puiplish tufts with often short stout stems and a hyaline to yellowish or red- 

 dish wood-cylinder; the other characters are as described below for the variety 

 viride, to which some of our collections belong, although color differences are 

 here perhaps of not much taxonomic value. 



Cambria Co.: Cresson, James. (Porter's Catalogue). Erie Co.: Lo • i le. L.K.H. 

 1950. HiTNTiNGCON Co.: Warrior's Ridge, Porter. (Porter's Catalogue). Warren Co.: 

 Columbus bog. C.M.B. 1948. It has been found also in Allegheny, Butler, Clearfield, 

 Crawford, Fayette, Forest, McKean, Mifflin, Somerset, and Westmoreland counties. 



