Watson .— Sphagna: Habitats , Adaptations , and Associates. 543 
Fig. 5. Sphagnum recurvum. A. Portion of plant showing a fascicle of branches, three other 
fascicles being indicated. The figure is somewhat diagrammatic, since the pendent branches have 
been separated from each other and from the stem, whilst those from the other fascicles have been 
removed, x 4. b. Transverse section of stem, x 60. c. Transverse section of branch-leaf, x 240. 
S. amblyphyllum (= S. recurvum var. amblyphyllum ). D. Outer portion of branch, showing 
the layer of retort cells and one layer of cortical cells, x 80. All the leaves have been removed. 
A. molluscum. e. Outer portion of branch, showing large retort cells and smaller cortical cells, 
x 80. 
S. inundatum. F. Branch-leaf, x 18. G. Cells of branch-leaf as seen from the inner surface, 
x 240. H. Cells of branch-leaf from the outer surface, x 240. 
S. cymbifolium. 1. Branch-leaf, x 18. J. Cells from inner surface, x 240. K. Cells from outer 
surface, x 240. The chlorophyllous cells are almost concealed by the hyaline cells, the walls of 
which appear to be thick, this appearance being due to the nearness of the two walls, whilst the 
darker contents of the chlorophyllous cells just show between. L. Transverse section of branch- 
leaf, x 240. M. Transverse section of stem, x 60. N. Portion of stem-section showing one hyaline 
cell and part of the stereom cylinder, x 240. Chloroplasts are present in some of the cells. 
S. imbricatum. O. Transverse section of branch-leaf, x 240. 
S. cuspidatum. P. Transverse section of stem, x 60. 
S. obesum. R. Branch-leaf, x 18. T. Cells of branch-leaf viewed from inner surface, x 240. 
Y. Transverse section of branch-leaf, x 240, showing four chlorophyllous and three hyaline cells. 
S. compactum. w. Branch showing imbrication of leaves, x 7. 
A. rufescens. x. Cells of branch-leaf viewed from inner surface, x 240. Y. Cells from outer 
surface, x 240. 
All the leaves a!re figured as seen from the inner surface The incurved portions of the leaves 
are shaded. In a figure of a leaf-section the outer surface is placed uppermost. » 
