231 
On Bog Mosses. By B. Braithwaite. 
detected in Europe, and the close relationship between the mosses 
of the two countries has induced me to include these species also 
in the present monograph. 
20. Sphagnum Pylaiei Bridel. 
Bryol. Univ. I, p. 749 (1826). 
Plate CVI. 
Syn. — S ullivant Icon. Muse. p. 12, t. 6 (1864). Austin Muse. Appal. No. 23 
(1870). 
Sph. sedokles var. Sull. & Lesq. Muse. bor. — arner. No. 4 (1856). Sell. 
Mosses of Un. St. p. 12 (1856). [Sph. cymbifolium forma juvenilis, C. Mull. 
Synop. I. p. 92 (1849). 
Dioicous ? olive-green , fuscous or blaclcish. Stem erect, un- 
divided, slender, 2-4 in. high, with a single layer of small cortical 
cells, and a narrow reddish brown woody layer ; branches all 
solitary or in 'pairs at the lower part of stem, short, terete, obtuse, 
arcuato-decurved, the cortical cells small, retort-cells few, narrowly 
cylindric, not recurved at apex. 
Stem leaves numerous, laxly imbricated, erect, ovate-oblong , 
concave, rounded and minutely erose at apex, the hyaline cells 
fbrillose. Branch leaves laxly imbricated, very small, ovate, 
obtuse, the margin incurved in the upper third, entire at apex ; 
hyaline cells with strong annular fibres, and without pores, in 
section circular, separated both in front and back by the chlorophyll 
cells , which are very thick and obtusely trigonous. 
Hab. — Peat bogs. Newfoundland (La Pylaie). Table Rock, 
S. Carolina (Lesquereux). Willey Mountain, New Hampshire 
(James). Adirondack Mountains, New York (Peck). New Jersey 
(Austin). 
Yar. /3. sedoides (Brid.) Lindb. 
Sph. sedoides Bridel Bry. Un. I. p. 750, et var. prostratum (1826). Sell. 
Muse. Alleghan. No. 20S (1845). Sull. & Lesq. Muse. bor. — amer. No. 3 (1856). 
Sull. Mosses of Un. St. p. 12 (1856). Ic. Muse. p. 11, t. 6 (1864). Austin Muse. 
Appal. No. 24 (1870). 
Stem procumbent at base, 3-5 in. high, simple or with a few 
short, scattered branches, fragile, flaccid, dull pale green, the upper 
part vinous red. Leaves large, very densely imbricated, oblong- 
ovate, concave, obtuse, entire or eroso-denticulate, with a border of 
two rows of extremely narrow cells ; hyaline cells elongated, with 
annular fibres, and very few minute pores. Branch leaves similar 
hut smaller. 
Hab. — Peat hogs. Newfoundland (La Pylaie). Wet margins of 
Table Rock, S. Carolina (Gray and Lesquereux). Mount Marey, 
New York (Torrey). Adirondack Mountains, New York (Peck). 
Sphagnum Pylaiei and its variety have been regarded by most 
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