MOSS HABITATS. 



39 



Polytrichum formosum rejoices in open woods, and forms 

 extensive loose tufts (fig. 22). The stems are often five or 

 six inches high, and are terminated by long fawn-coloured 

 fruit-stalks. The capsules are large, four or five angled, and 



FIG. 22. Polytrichum formosum, natural size, c, k. i, fruit slightly enlarged ; 

 a, calyptra ; b, capsule ; c, apophysis. 2, hairy calyptra more enlarged. 3, fruit 

 to show rostrate lid. 



slightly swollen at the base, this swollen portion being called 

 the apophysis (fig. 22, i c). The mouth of the capsule is 

 closed by a reticulated diaphragm (fig. 16, 30), and fringed 

 by sixty-four short, pale teeth (fig. 16, 3^). The lid is long 



