810 THE JOURNAL OF BOTANY 
mes s 
cells and in the middle of the leaf towards the lateral margins with 
a few ay pores, which, in some cases, exactly cover the pores 
on the inner surface. 
Chlorophyllose cells in section triangular-oval, inserted ae 
the hyaline cells on the outer surface of the leaf and here on 
the inner surface completely enclosed by the hyaline sae which 
are united together for some distance; hyaline ang almost flat on 
the outer 28 strongly convex on the inner surfac 
Polyoicous; antheridia borne on both Doeading and pendent 
branches ; male branches in the antheridium- bearing part generally 
rather darker brown , later becoming elongated at the apex; peri- 
gonial bracts differing much from the sterile leaves ; small, ovate, 
ca 
broadly truncate apex, as in the stem-leaves; in the basal part 
composed of Sularaphilloss cells only, in the uppe 
kinds of cells and having the walls of the — cells reabsorbed 
on both — Spores 53 pin diameter, papillos 
— Deep mountain bogs in northern and iipiue' egions. 
Europe; Lapland, Finland, Snape Scotland, 
Shetland, , Silesia, Alps of Salzbourg and Styria; numerous localities 
in North America. Ben Wyvis, Ross- ei (McKinley); Unst 
Shetland (Sim). 
S. Lindbergii is clearly distinguished phe the other species of 
the section by the structure of the stem-leaves, which close ely 
resemble those of S. gcse the Br itish specimens are muc 
smaller than those from more n ern continental localities. 
There are three main varia based upon the size of the 
branch-leaves :— 
(1) Var. macrophyllum hebersrre: oe Torfm. No. 859 (1894), 
with very long and wide branch-leave 
ar. mesophyllum Warnst. in L e., with the — leaves of 
medium size, about 1°5 to 1*6 mm. lon and ‘57 m 
(3) microphyllum Wayrnst. in eave’ 1898, TM, its the 
branch- leaves very small, about ‘86 mm. long and -43 mm. wide. 
This variety closely revcinbied in general habit and feene © a dense 
and Sey branched form of S. fuse 
(188 . S. rrarrom Angstr. in ce V. Ak. Handl. 21, 198. 
ne 
Spi, S. intermedium var. riparium Lindb.; S. cuspidatum var. 
speciosum Russ.; S. speciosum Klinger.; 8S. spectabile Schimp. 
icat 
when growing in the shade green throughout, in more expo 
habitats pale and often a beautiful jelibte a re capitulum. 
