218 THE JOURNAL OF BOTANY 
which is frequently torn, toothed, or weakly fimbriate; the broad 
border is much widened below ; lateral margins slightly undulate ; 
hyaline cells with or without fibrils in the upper half of the leaf, 
2-4 (rarely to 6) times septate by oblique cross-walls, and with 
delicate longitudinal plice. 
Stem-cortex in 8-4 layers, formed of medium-sized, thin-walled 
cells, of which the outer walls are not porose. 
ascicles distant or closer together, of 8-4 branches, of which 
i horte i 
tort- 
2-38 rows of narrow cells; the leaf has a longitudinal fold in the 
middle above the base, and the membranes of the hyaline cells 
h i : 
margins; the entire outer surface with pores, which at the apex are 
strongly ringed, and but little smaller than those in the middle of 
the leaf; at the base the pores are very large, non-ringed, placed 
singly in the middle of the cell-wall between the fibrils ; near the 
margins the pores on the upper and lower surfaces frequently 
exactly cover one another, so that complete perforation of the 
leaf results. 
Chiorophyllose cells in section as in S. fuscum. 
Dioicous, rarely monoicous ; male branches in the antheridium- 
bearing part always purple- or violet-red ; perigonial bracts ovate, 
produced above into a smaller, rounded, slightly toothed, cucullate 
apex; in the lower part without fibrils and pores. Pericheti 
bracts large, ovate, suddenly produced above into a narrow truncate 
involute apex ; in the lower part consisting of either chlorophyllose 
cells only, or, with the exception of the apex, with both kinds of 
Fruit very rare. 
_ Hab. 8S. rubelium, like S. fuscum, with which it frequently grows 
intermixed in the same tuft, is a true moorland plant 
Jones). 
The numerous varieties are based upon the colour of the tufts. 
