48 
On Bog Mosses. By R. Braithwaite. 
This fine and rare species stands at the head of the Cymbifolia 
group, and naturally arranges itself with Sph. Austini and papil- 
losum. It may at once be distinguished by the beautifully fringed 
margin of the branch leaves, and by the curious downward pro- 
longation of the transverse wall of the cortical cells of the branches, 
which may he readily observed in the series of cells at each lateral 
margin. 
Subgenus Isocladus. Lindb. 
Plants lurid-whitish-green, glossy. Ptamuli 2—4 in a fascicle, 
all uniform and divergent, with very large, narrow, loosely spreading 
leaves, their cells very narrow, without fibres and with a central 
longitudinal row of pores 
22. Sphagnum macrophyllum Bernhardi. 
Bridel, Bryol. Univ. I. p. 10 (1826). 
Plate CXI. 
Syn. — Drummond Muse. Amer. Coll. 2, No. 18 (1841). Sulliv. Muse. Alleghan. 
No. 207 (1845). Mosses of Un. St. p. 12 (185G). Ic. Muse. p. 1 t. 1 (1864). 
C. Mull. Synops. I. p. 91 (1S49). Sull. Lesq. Muse. bor. Amer. No. 1 (1856). 
Austin Muse. Appal. No. 41 (1870). Isocladus macrophyllus Lindb. Ofv. af K. 
Vet. Ak. Forh. XIX, p. 183 (1862). 
Dioicous, pale olive-green, fuscescent below, when clry glossy 
and shining. Steins 6—10 in. high, rather rigid, very fragile, 
fuscous, simple or dichotomous by innovation, with 2—3 layers of 
cortical cells. 
Branches crowded in a spinose capitulum 3—4 in a fascicle , 
uniform and similar, divergent, dependent, straight, subflabellate, 
lax-leaved, the cortical cells short, uniform, with few pores. Stem 
leaves minute, very broad at base, ovate-oblong, obtuse, entire, the 
hyaline cells rhomboid, without fibres, but with 1—3 central pores. 
Branch leaves rather rigid, subdistichous, small at base of 
branch, soon becoming elongated, narrowly lanceolate, and lanceo- 
late-subulate, involute-concave, bordered by 1—2 rows of extremely 
narrow cells, apex somewhat truncate with 7—8 teeth. Hyaline 
celts elongate fexixoso- fusiform, with 6—10 pores in a longitudinal 
median line ; free from fibres. Chlorophyll cells circular in section, 
separating the hyaline both in front and back. 
Fruit in the upper fascicles or in the coma, divergent ; peri- 
clivetial bracts 6—9, lax, oblong-ovate, uppermost convolute, truncate, 
and toothed at apex, the areolation resembling that of the branch 
leaves. Capsule small on a shortish slender peduncle ; spores 
sulphur coloured. 
Male plant and prothallium unknown. 
Hab. — North America. Near Philadelphia (Bernhardi). 
Swamps in Louisiana (Drummond). Raccoon Mountains, Alabama 
