Watson. — Sphagna: Habitats , Adaptations , Associates. 539 
apex is curved over so as to form a hood (Fig. 5 > l)« This cucullate leaf is 
a distinctive character of the Cymbifolia section (S. cymbifolium , papillo¬ 
sum , 5. medium , vS. imbricatum ), but is slightly shown in members of other 
groups, e.g. .S', rubellum (Fig. 3, e). 
Fig. 2. Sphagnum subnitens, R. and W. a. Diagrammatic sketch of the fertile plant, x f. 
B. Portion of the plant showing two fascicles or groups of branches, x 3; the stem-leaves are 
numbered to show the § arrangement, leaves 2 and 5 being on the other side of the stem. The 
leaves 3 and 4 are usually nearer together than they are shown in the figure, c. Stem-leaf, x 17, 
indicating the border of narrow cells becoming broader below. D. Stem-leaf, x 17, showing 
undulations and the margin ini oiled at apex. e. Cells from the middle of the stem-leaf, x 210. 
Chi. Chlorophyllous cell with chlorophyll granules. Hy. Hyaline or empty cell which is usually 
divided by oblique septa. F. Cells from the margin of the stem-leaf, x 210. g. Branch-leaves, 
x 17. h. Outer surface of branch-leaf showing fibres and pores, x 210. 1. Inner surface of 
branch-leaf, x 210. Chi. Chloroplastids. J. Portion of section of branch-leaf showing two hyaline 
and one chlorophyllous cell, x 210. 
The formation of capillary chambers along which water may pass is 
general in the genus. The branches are in fascicles (Fig. 2, a), their number 
varies in different species, and what is more important, they vary in position, 
some being stronger than others so that they occupy more patent positions. 
The weaker branches are often closely appressed to the stem and so form 
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