THE EUROPEAN SPHAGNACEE 3818 
upper half or more, and by the chlorophyllose cells of the branch- 
leaves, which are generally trapezoid in section. 
1% 8: nsec at Warnst. in Bot. Genial, Ixxxiil. 1900, 70. 
Syn. 8. cuspidatum var. monocladum War 
Plants salinhtings a Harpidium in habit ; rat or yellow-green ; 
completely submerged as in S. cuspidatum var. plumosum, and reach- 
ing 20 em. in length; the entire stem bearing branches, which 
are usually singly arranged (not in fascicles); branches becoming 
regularly shorter = owards the apex of the stem, at the base the 
branches as much as 13 em. long, and again branched and re ers 
nating so do the main stems in small capitula. 
Cortex of the thin stems generally one-layered, cells wide and 
clearly differentiated from the wood-cylinder 
Stem-leaves large, about 8 mm. long and 1:2 mm. wide, ovate- 
lanceolate, apex widely truncate and with 5-8 teeth; border of 
equal width throughout; the narrower and longer hyaline cells are 
non-porose and not always fibrillose, and are frequently divided by 
a cross- wa frequently two or more chlorophyllose cells adjoin 
one another. 
Branch-leaves very large, 4-5 mm. long and about 1:2 mm, 
wide, from a broadly ovate jie gradually gerbes into a broadly 
truncate and toothed apex; border of 4-5 rows of narrow cells; 
margin entire ; when dry undulate. Cell-for nein as in the stem- 
leaves; the cell- year a of some of the leaves deeply plicate ; 
non- ashi on both surfac 
lorophyllose cells in Seckun rectangular, centric, with the wall 
of equal thickness all round ; enclosed by the biplanar hyaline cells 
on neither surface, and with the free walls generally somewhat 
convex. 
Distrib. Germany. 
18 pss Russ. & Warnst. in Sitzungsber. d. Dorpater 
Naturforscher- at 1889. 
E: 
¢ phagn. Brit. Exsice. nos. 
Plants amity ‘completely submerged in Seth ome 
robust, sometimes — varying in ae ee whitish, 
Pe eee, r ; soft or rather rigi 
reddis 
Stain cortea almost always ened bene tgrstr of 2-3 layers of 
ore or less thick-walled non-porose cells. Cells of the medulla 
rarely with rudimentary fibrils. 
Stem-leaves large, igose eles- triangular, apex generally narrowly 
truncate, and toothed, and with inrolle d margin; border broad and 
generally much widened below, more rarely nd almost equal width 
throughout ; hyaline cells in the apical part and at times also lower 
down with fibrils and numerous membrane-gaps on the inner side ; 
or less spreading; the more pendent ones but little weaker than 
the others. Branch- ei generally long lanceolate-subulate, 
