THE EUROPEAN SPHAGNACE® 255 
Branch-leaves of the spreading branches smaller or larger, 
rounded truncate apex, with the margin inrolled; border 3-5 cells 
wide; in the middle of the leaf above the base with a longitudinal 
Hyaline cells with numerous fibrils; pores on the inner 
generally quite without a border, and situated in the middle of the 
cell-wall; in the apex of the leaf with small scattered pores in the 
upper and lower cell-angles; pores on the outer surface much more 
numerous, in the upper two-thirds to three-fourths of the leaf large, 
bordered, semi-elliptical, and arranged on the commissures; near 
the margins some of them are immediately opposite the pores on 
the inner surface, so that complete perforation of the leaf results ; 
above the leaf-base the pores are very large and non-bordered, situ 
ated between the fibrils in the middle of the cell-wall. Leaves of the 
the angles, on the outer surface as in the other leaves. 
Chlorophyliose cells in section isosceles-triangular to isosceles- 
trapezoid (in apex always the latter), inserted between the hyaline 
ls on the inner surface of the leaf, and here always free; on the 
branch-lea by the generally non-fibrillose stem-lea ro- 
duced into a longer or shorter apex, and by the several times septate 
y lis. From large and robust for of S. quinguefarium it 
1s distinguished by the more longly acuminate branch-leaves, never 
arranged in five rows, and by the di : 
Incompletely developed forms may be mistake 
that species may always be recognized by the 
- Of the upper part of the branch-leaves. 
denticulate margin 
