12 0)1 Bog Mosses. 



rhombic above, without fibres or pores, but here and there with a 

 transverse partition. 



Hamuli 4—5 in a fascicle, of which 2-3 are divergent, tumid 

 attenuated toward the points, with the leaves on the lower two- 

 thirds squarrose and recurved from tJie middle, those of the upper 

 third imbricated and elongated ; the other branches pendulous and 

 appressed, slender, terete, with all the leaves imbricated; cortical 

 cells elongated, in two strata, the retort-cells perforated but scarcely 

 prominent at apex. Branch haves from a very concave base, 

 broadly ovate, suddenly becoming lanceolate above, the margin 

 involute in the upjjer third, the apex minutely 3-4 toothed, 

 bordered by 2-3 7'ows of very narrow cells ; hyaline cells with 

 numerous annular fibres and two rows of large pores, chlorophyll 

 cells compressed entirely enclosed by the hyaline. 



Male amentula terete, clavate, yellowish-green ; the bracts 

 slightly squarrose, oblong-lanceolate, the basal cells without fhres 

 and jx)res, the upijer shorter, uith annular fibres and small pjores. 

 Fruit seated in the coma or in the axils of the upper fascicles, 

 moderately elevated ; the bracts somewhat distant, concave convolute, 

 the lower oblougo-eUiptic, the upper very broad, obovate emar- 

 ginate and slightly fimbriate at apex, laxly areolate, without fibres 

 or pores. Spores yellow. 



Var. /3, squarrosulum. Sph. squarrosulum Lesquereux. 



Plants smaller, more slender, deep green above, pale below. 

 Stem pale green. Leaves small, more distant. 



Hab. — About boggy springs and the sides of moorland streams. 

 yS, in more shady alpine places. Fruits in July. Not uncommon, 

 and found throughout Europe and the middle and northern states 

 of North America. This fine species sometimes attains a great 

 size, becoming proportionately robust, and thus may be looked 

 upon as the grandest European rej)resentative of the genus. It 

 may be readily recognized by its squarrose leaves, and often bears 

 fruit abundantly. Lindberg considers squarrosulum Lesq. to be 

 rather a starved or undeveloped form than a distinct variety, yet it 

 is widely distributed, but does not appear to have been ever found 

 with fruit. 



o 



15. Sphagnum teres Angstrom. 



Hartm. Skand. Fl. ed. 8, p. 417 (1861). 

 Plate LXVIII. 



Syn.— LiKDB. Torfm. No. C (1862).— Milde Bryol. Siles. p. 388 (1869). Sph. 

 poroswn LiNDB. MSS. 



Sph. squan-osuM var. y teres Schpe. Torfm. p. 64 (1858). Synop. p. 677 (1860). 

 — KUS.SOW Torfm. p. 64 (1865). 



Bioicous, in small tufts or intermixed with otiier species, soft, 

 pale yellowish green often with a ferruginous tint. Stems slender, 



