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II . — On Bog Mosses. By R. Bratthwaite, M.D., F.L.S. 
Plates CX. and CXI. 
21. Sphagnum Portoricense Hampe. 
Linnoea 1852, p. 359. 
Plate CX. 
Syn. — Sullivant Icon. Muse. p. 3, Tab. 2 (1864). — Austin Muse. Appalach. 
No. 1 (1870). 
Sph. Sullivantianum Austin iu Amer. Journ. Sci. 1863, p. 252. 
Dioicous ? in large soft tufts, pale fuscous below, pale glaucous 
green above. Stems 8—14 in. high, stout, simple or bipartite, 
firm, pale brown ; cortical cells in 2-3 layers, containing spiral 
fibres but few pores. Stem leaves auricled, erect or deflexed, 
subquadrate-ovate, fringed round the entire margin, upper cells 
rhomboidal, lower elongated, all without fibres or pores. 
Bamuli 4-5 in a fascicle, 2—3 divergent, arcuate-patent, 
subclavate- fusiform, attenuated at base, the leaves julaceously 
imbricated ; pendent branches more slender, lax. Cuticular cells 
spirally fibrillose with few pores, the transverse walls geniculate 
downward into the adjacent cell, usually having a pore at the apex 
of the bend. 
Leaves of the divergent branches small below and widely 
cordate or semicircular, becoming larger above, narrowed at base, 
the median orbiculate-ovate, squamoso-scabrous at bach of the 
strongly cucullate apex, very narrowly margined, all minutely 
fimbriate throughout, the fibrils of the fringe formed of the 
commissural walls of destroyed hyaline cells ; lower hyaline cells 
elongato-rhomboidal, upper rhombic, with numerous strong papillae 
internally on the wall combined with the chlorophyll cells, all 
fibrillose, with several large pores at the margin ; chlorophyll cells 
triangular in section, interposed between the hyaline on the concave 
surface of leaf. Fruit unknown. 
Hab. — Swamps in mountain districts. First found in Porto 
Rico by Schwanecke. Manchester ponds, Ocean County, New 
Jersey (Austin). 
[ EXPLANATION OF PLATE CX. 
Sphagnum Portoricense. 
a. — Plant from Austin’s collection. 
1. — Part of stem and branch-fascicle. 
5. — Stem leaves. 5 a a. — Areolation of apex of same. 
> 6. — Leaf from middle of a divergent branch. 6 x . — Section of same. 6 c. — Cell 
from middle x 200. 6 b . — Leaves from base of the same branch. 8. — Leaf 
from a pendent branch. 
9 x . — Part of section of stem. 
10. — Part of a branch denuded of leaves. 10 a. — Cuticular cells of same. 
10 b. — The same seen laterally. 10 x. — Transverse section of a branch. 
E 2 
