IO2 



BOTANY 



ing a central core of ordinary cells (Fig. 40 C, s). The 

 moss sporocarp in most cases is provided with a special 

 mechanism to cause it to open 

 when the spores are ripe so that 

 u the latter may be discharged. 



FIG. 40. Funaria. A, young sporo- 

 carp ; c, capsule or sporogonium. B, 

 moss plant with attached sporocarp 

 mature; s, stalk of sporogonium ; /, 

 capsule; g, leaves of the moss plant. 

 C, section of a sporogonium ; s, layer 

 of cells which develop the spores. 



,-, -r> When the spore germinates 



, it produces a little filamentous 

 FIG. 39- ,4, section of stem of ___ __ Al _ ___^_._^ ,_ __^__ x ___.,__ 



moss bearing archegonia ; B, outgro wth which branches freely 



open neck of archegonium ; on the moist Soil, and which 



resembles very closely a fila- 

 mentous alga. The moss plants 

 originate by the development of buds upon this out- 

 growth, which is known as a protonema. 



C, archegonium highly mag- 

 nified. (After Sachs.) 



