34 A MANUAL OF MOSSES 



and the cells are more incrassate than in the typical form of 

 the species. All possible intergradations are represented by 

 the specimens examined : 



Cambria : Boggy plateau near St. Lawrence, July 24 

 1908. O. E. J. 



Center : In Rhododendron thicket, Bear Meadows, Sep- 

 tember 21, 1909, and bogs in "Barrens" near 

 Scotia. Inly 17, and September 22, 1909. O. 

 E. J. 



Crawford : Around Mud Lake, Hartstown, May 29-31, 

 1910. O. E. J. and G. K. J. (Figured). 



Indiana : Along margin of stream near Cherry Tree, 

 July 11, 1908. O. E. J. 



Jefferson : Kate Stoy. 



Mercer : Bog, Half-moon Swamp, June 12, 1906. O. E. J. 



9. Sphagnum parvifolium (Sendtner) ^'arnstorf. 

 (S. angustifolium Jensen: .V. brevifolium Roell : 5*. rccun'iiin var. 

 parvifolium Warnstorf; S. amblyphyllum var. parvifolium 

 Warnstorf). 



(Plate III) 



Softly and loosely cespitose, yellowish- to grayish-green, 

 or brownish above: stems slender, usually at least 10-12 cm. 

 high, the wood-cylinder yellowish and without any distinctly 

 differentiated cuticular sheath : stem-leaves small, usually 

 0.5-0.7 mm. long, equilaterally triangular to somewhat tri- 

 angular-lingulate, the apex rounded or somewhat truncate, 

 erose-dentate. the hyaline border narrow above and very wide 

 below ; hyaline cells of stem-leaves non-fibrillose, non-porose, 

 a few septate towards the base on each side of the median 

 region ; branches 3-5, two being slender and appressed-pen- 

 dent, two or three short, 5-9 mm. long, divergent, recurved 

 at the tips; branch-leaves lance-ovate, about 1 mm. long, con- 

 cave, the uniformly narrowly hyaline-bordered margin involute 

 towards the narrowed, slightly truncate-erose apex, leaves 

 when dry more or less undulate, loosely imbricate, with widely 

 spreading or recurved tips ; hyaline cells of branch-leaves 

 narrow, fibrillose, ventrally with rounded medium-sized pores 

 in the cell-angles, dorsally with rather smaller round pores in 

 the cell-angles or sometimes also in rows laterally ; in cross- 

 section the chlorophyllose cells triangular and only dorsally 

 exposed, or more usually trapezoidal and free on both faces, 

 the dorsal face wider, the hyaline cells more convex ventrally: 

 fruit not seen. 



In bogs, swamps, etc., probably widely distributed. In 

 North America known from Connecticut and New Jersey to 

 Washington State. In our region known from one locality 

 only : 



