VI MOSSES {MUSCl): SPHAGNACEM—ANDRE^ACE^E i 



D3 



as a bud. In size the gamctophore of the Mosses ranges from 

 a millimetre or less in height in Buxbauitiia and EpJicinemvi 

 to 30 to 50 cm. in the large Polytrichacec'E and Foiitinalis. 

 The branching of the gametophore is never dichotomous, and so 

 far as is known the lateral branches arise, not in the axils of 



the leaves, but below them. 



Underground stems or stolons, 



\ 











Fig. -ii.—CUinachtin Ainericanuui (Brid.), showing the formation of stolons, X2. 



which afterwards develop into normal leafy axes, are common 

 in many forms, e.g. Cliniacium (Fig. 75). 



The sexual organs are borne either separately or together 

 at the summit of the gametophoric branches. Where the 

 plants are dioecious, it sometimes happens that the two sexes 

 do not grow near together, in which case, although archegonia 

 may be plentiful, they fail to be fecundated and thus no cap- 



