38 A MANUAL OF .MOSSES 



usually two of these variously diveri^ent, rather slender, terete, 

 about 1-1.5 cm. long, the others very slender and appressed- 

 pendent : branch-leaves ovate, concave, about 1.5 mm. long, the 

 narrowly 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 S-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 ellip- 

 tic pores about one-third as wide as the cell and situated along 

 the sides and angles of the cell ; in cross-section the chlorcj- 

 phyllose 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 Newfoundland to Alaska and south to New Jersey and 

 Pennsylvania. In our region apparently represented only by 

 the following variety, more properly a form, as follows : 

 13a. Sphagnum plumulosum variety viride Warnstorf. 

 (S. siibnitens van viride Warnstorf). 



This 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: Shaded boggy margin of Mud Lake, Harts- 

 town, May 29-31, 1909. O. E. J. and G. K. 

 J. (Figured). 



14. Sphagnum capillifolium [Ehrhart] Hedwig. 



{S. acutifoUuiu [Ehrhart] Russow and Warnstorf). 



The typical form of this species has green to pale or \ari- 

 ously reddish to purplish tufts with often short stout stems 

 and a hyaline to yellowish or reddish wood-cylinder; the other 

 characters are as described below for the variety viride, to 

 which variety our single collection belongs, although in Por- 

 ter's Catalogue the species is reported, as follows ; under the 

 name S. acntifoliiun Ehrhart : 



Cambria : Cresson, James. (Porter's Catalogue). 

 Huntingdon: Warrior's Ridge, Porter. (Porter's Cata- 

 logue) . 



