BY L. RODWAY. 257 



1913. 



pidate or in upper leaves acute ; tracheids long about 2tV 

 diameter ; closely fibred ; pores small, few along the mar- 

 gin or absent. In transverse section the cells are small, 

 broadly wedge-shaped with convex walls and obtuse apex, 

 base not broad, freely exposed on the external surface. 

 Blue Tier, Alma Tier, Cradoc. 



Sphagnum Rod way i Warnat. 



Tall and very slender. Fascicles distant, branches 3-5 

 slender tapering 2-3 cm., unequal, pendants with narrower 

 leaves, but little distinct. Stem cortex of one or two series 

 of slightly enlarged cells, wood cylinder ill-defined. Stem 

 leaves ovate 1.6 mm., border broad well defined, apex ob- 

 tuse, cuspidate, but not distinctly truncate. Branch cortex 

 with inflated retort cells, the mouth nearly sessile ; branch 

 leaves narrow ovate-lanceolate. 2-3 mm., upper leaves rather 

 longer and much narrower, border well-defined. 3-4 series, 

 margin with few distant small serrations, apex minutely 

 truncate, cuspidate ; tracheids not very long, copiously 

 fibred, about 16m diameter; pores circular about 5^ few 

 along the side of the upper tracheids. Cells in transverse 

 section small wedge shaped with convex walls, the base 

 freely exposed on the external surface. 



Strickland. 



S phngjium serriilatum Warnst. 



Slender, dark green, branch fascicles rather distant. 

 Stem tissues not clearly marked off from one another, the 

 woody cells slightly thickened and not daxk, the cortex of 

 one or two layers not differing except by the walls being 

 thinner; stem leaves ovate-triangular, 1.8 mm.; apex 

 minutelv truncate cuspidate, marginal cells not much nar- 

 rowed, chlorophyllous cells as broad as the tracheids which 

 are without fibres or pores. Branches usually four in each 

 fasciculus, long, slender and flaccid, leaves lanceolate taper- 

 ing to a slender but obtuse dentate apex, 5-6 mm., margin 

 cuspidate, all the cells chlorophyllose and without fi.bres 

 or pores, the upper ones rhomboid. 



In a ditch near Strahaii. 



Sub-section Subsecunda. Slender to rather robust; leaves 

 ovate, ovate-lanceolate or oblong, apex truncate cuspidate; 

 stem cortex of 1 rarely 2 series of sliehtly enlarged ohIIs, 

 wood cylinder well developed. Tracheids mostly 17-30^1 

 diameter. Cliloropliyllous cells elliptic central rarely 

 jiartly exposed on the ventral surface. 



