EUROPE AND NORTH AMERICA. 87 



rank, but also to that of a separate section in the genus, as indicated 

 by Professor Lindberg under the appropriate title of Hemitheca. 



The var. sedoides bears the same relation to the type as the var. 

 cyclophyllum does to Sph. laricinum. Perhaps the most singular 

 feature of the plant is the very small capsule, which appears to 

 have been overlooked until collected by Austin, and even when 

 present, some care is required before it can be detected, so com- 

 pletely is it concealed by the perichaetial bracts. 



Sect. III. — Isocladus, Lindb. 



Plants whitish, glossy, resembling some species of Lencobryum, 

 rigid, fragile. Branches acute in distant fascicles of 2-5, all 

 arcuato-divergent, subclavate. Branch leaves very large, accrescent, 

 distant, spreading, lanceolate; the cells very narrow, serpentine, 

 without fibres, but with a central longitudinal series of pores. 

 Perichaetial bracts divergent, resembling the leaves in structure. 



20. Sphagnum macrophyllum, Bernhardt 

 Pl. xxix. 



Dioicous ; pale olive green, glossy, shining. Branches uniform, 

 divergent, lax-leaved. Stem leaves minute, ovate-oblong, obtuse. 

 Branch leaves narrowly lanceolate-subulate, toothed at apex ; 

 hyaline cells narrow, elongated, without fibres, and with 6-10 pores 

 in a longitudinal median line ; chlorophyllose cells circular, separating 

 the hyaline both in front and back. 



Synon. — Sph. macrophyllum, Bernh. Brid. Bryol. Univ. i. p. 10 (1826). Drumm. 

 Muse. Amer. Coll. 2, n. 18 (1841). Sulliv. Muse. Allegh. n. 207 (1845) ; Mosses 

 of Un. St. p. 12, n. 10 (1856), et Ic. Muse. p. 1, t. 1 (1864). C. Mull. Synops. i. 

 p. 91 (1849). Sull. Lesq. Muse. Bor.-Amer. n. 1 (1856). Austin, Muse. Appal. 

 n. 41 (1870). 



Tsodadus macrophyllus, Lindb. Ofv. af K. Vet. Ak. Forh. xix. p. 133 (1862). 



Dioicous, pale olive green, fuscescent below ; when dry, glossy 

 and shining. 



Stems 6-10 in. high, rather rigid, very fragile, fuscous, simple 

 or dichotomous by innovation, with 2-3 layers of cuticular cells, 

 and small, yellowish peripheral cells. 



Stem leaves minute, very broad at base, ovate-oblong, obtuse, 

 entire; the hyaline cells rhomboid, without fibres, but with 1-3 

 central pores. 



Branches crowded in a spinose capitulum, 3-4 in a fascicle, 



