48 
On Bog Mosses. By B. Braithwaite. 
This fine and rare species stands at the head of the Cymbifolia 
group, and naturally arranges itself with S^h. 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 be readily observed in the series of cells at each lateral 
margin. 
Subgenus Isocladus. Lindb. 
Plants~ lurid-whitish-green, glossy. Eamuli 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). Sulltv. Muse. AUeglian. 
No. 207 (1845). Mosses of Un. St. p. 12 (1856). le. Muse. p. 1 t. 1 (1864). 
C. Mull. Synops. I. p. 91 (1849). 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. 1.83 (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 
cortical cells. 
Branches crowded in a spinose capitulum 3—4 in a fascicle, 
wiiform and similar, divergent, dependent, straight, subflahellate, 
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 
cells elongate flexuoso fusiform, ivith 6—10 pores in a longitudinal 
median line ; free from^ fibres. Chlorophyll cells circular in section, 
sepjarating the hyaline both in front and bach. 
Fruit in the upper fascicles or in the coma, divergent ; peri- 
chsetial bracts 6—9, lax, oblong-ovate, uppermost convolute, truncate, 
and toothed at apex, the ar eolation 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). Eaccoon Mountains, Alabama 
