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, July 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) Warnstorf. 

 {S. angustifoHum Jensen ; S. brevifolium Roell ; 5. recurvum var. 

 pai-vifoUum Warnstorf; S. antblyphyllum 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 

 M^ashington State. In our region known from one locality 

 only: 



