126 



MOSSES AND FERNS 



CHAP. 



on the sporogonia is not to be assumed. The mucilage sHt 

 becomes wider, and beneath it an intercellular space is formed 

 which widens into a cavity whose cells secrete the abundant 



Fig. 6^,—Anthoceros fusiformis. A, Young plant with single growing point (.x)t X85; 

 B, horizontal section of the growing point of a similar plant, X525; x^ the single 

 apical cell; C, similar section of a growing point from an older plant, with pos- 

 sibly more than one initial cell> X260; D, a mucilage slit from the ventral side of 

 the thallus, XS^S- 



mucilage filling it. This mucilage escapes through the clefts 

 and covers the growing point in the same way as that secreted 

 'by the glandular hairs in the Jungermanniacese. 



