THE EUROPEAN SPHAGNACE® 889 
Hydrophilous, <rspaiteed with only the capitulum or the upper 
part above water. Resembling S. cuspidatwm var. aaeeren most 
closely in habit. Pectin generally robust, generally gre 
St in 2-8 layers, differentiated from the ‘whitish, 
greenish, or yellowish wood-cylinder 
Stem-leaves large, isosceles- triangular or triangular-lingulate to 
ae cored on the usually rounded apex weakly toothed or finely 
fimbriate; border wide, and generally much widened below 
Hyatina: cells in the apical part generally with fibrils; on the 
inner surface generally with membrane-gaps; on the outer surface 
either non-porose or with few ornumerous pores on the commissures, 
or in the middle of the cell-wall. 
Fascicles close or distant, generally of four branches; the two 
stronger spreading, the weaker generally directed downwards, and at 
an — angle from the stem; leave isons arranged, generally 
less secund, frequently nae shaped. Leaves of the 
> hor ophyllose cells in section trapezoid and free on both surfaces. 
oir ntheridium- 
cells only ; in the upper two-thirds to three-quarters of both kinds 
of cells; ais cells with se als fibrils, and on the inner surface 
with round pores or large membrane-gaps. 
Hab, Shady melee: foots intermixed with S. recurvum. 
Distrib. Europe: Germany, Styria, Russia, Finland, Denmark, 
Belgium, Sweden, Norway; Asia; N. America. 
S. Dusenii is readily distinguished fro 
annulatum by the batten | more or less secun 
large pores, and the chlorophyllose cells free on 
the leaf. 
ye following are the more important varieties :— 
Var. aquaticum Warnst. Europ. Torfm. ser. iv. No. 868, 
1804. Robust, almost completely submerged, or with t the capitulum 
above water. Leaves of the branches of the capitulum upright 
and undulate when dry, so that the capitulum appears crisped. 
(2) Var. deflecum Warnst. in Verh. Bot. Ver- Branden. 1890, 
Xxxii, 212 (sub S. mendocino). Green throughout, or with the 
m §. Jenseniti and S 
i branch- etary the 
both surfaces of 
