348 THE JOURNAL OF BOTANY 
Stem-cortex dev absent, not differentiated from the yel- 
lowish wood-c 
-  Stem-leaves nithae large, ioe rom about 1 mm. long, 
and about the same width at the base, somewhat fimbriate at the 
rounded apex through enrash of bie a his hyaline cell- walls ; 
border wide, much widened below. Hyaline cells in the lower and 
middle part of the leaf narrow, wider and shorter above, non- 
mice non-porose on both sides, but in ‘the middle of the upper 
part of the leaf with rudimentary or in part completely developed 
mic rarely quite without fibrils. 
ascicles generally with four branches ; two stronger, gradually 
aes at the apex, and about 15 mm. long, are spreading, the 
other weaker branches appressed tothe stem. Br anil indies fmnbri 
cate, never secund, when dry not or weakly undulate, not shining, 
lance nes about 2°15 mm. long and ‘86 mm. wide, with small 
the narrowly truncate apex ; border narrow, of 3-4 rows 
of blias i margin entire, widely in nrolled. Hyaline cells with very 
numerous ey: on the inner surface quite without pores, or in 
certain forms with few very small pores with indistinct contour (as 
in 8S, iiiction), and scattered very small strongly ringed pores; on 
the entire outer surface with extremely numerous small pores, which 
are generally in two rows on the commissures or in the middle of 
the sullowsh, seattle the apex sometimes strongly bordered and in 
rows like strings of pearls, the true pores sometimes interrupted by 
pseudo-pore 
Ohaeephilloce cells in section triangular, with the base of the 
triangle free on the outer surface, on the inner surface completely 
‘enclosed by the hyaline cells, which are only united together for a 
short distance 
company with ¥. Jensenii, 8. obtusum, S. recurvum 
is In 
var. amblyphyllum, S. platyphyllum, and 8S. subsecundum in Finland 
and Russia. 
enclosed on ‘the inner bole of the leaf; and from S. Jensenii by 
ery few pores on the inner surface of the leaf and the absence 
of corte cells. 
8. Jensenn Lindb. fil. in litt. ad Jensen et apud Soc. pro 
Sian et Flora fenn. 7, x. 99. 
Syn. 8S. annulatum Warnst, (non Lindb. fil.), p. p. 
Almost always brown. Stem-cortex distinetly differentiated. 
Branch-leaves never secund. Pores on the outer surface of the 
branch-leaves very iarenhia generally in two rows in the middle 
of the cell-wall, never passing over into membrane-gaps, smaller 
than in 8. Dusenii, wwheds the apex with bordered pores on the com- 
riot on the inner rig re nee very ora non-bordered 
, generally not close the commissures, and usually two 
seme each fibril. Chioiopleyliows cells priced enclosed on 
‘the inner surface. 
Distrib. Norway, Sweden, Finland, Russia. 
S. Jenseniit is readily distinguished from S. Dusenii by the 
