300 



SPOROPHYTE OF SPHAGNUM 



in the sporophyte of Sphagnum is provided for by the elongation 

 of the upper part of the moss stem which pushes the sporophyte 

 above the leaves and exposes the capsule to the winds quite as 



Fig. 204. Fig. 205. 



Fig. 204. Germination of the spore of Sphagnum: A, early growth of 

 the spore. B. later development — 5^, spore; b, bud developing into moss 

 plant. C, margin of the thallus, showing the origin of the bud. — After Camp- 

 bell. 



Fig. 205. The twisted stalk moss, Funaria: A, two sporophyte-bearing 

 plants, the remains of the archegonium or calyptra still attached to the cap- 

 sule on the right. B, enlarged view of plant with the young sporophyte, 

 still enclosed in the archegonium, just emerging above the leaves. C, the 

 male plant bearing the antheridia in a conspicuous rosette of leaves. D, 

 upper portion of the sporophyte, showing the twisting of the stalk or seta 

 that assist in sifting the spores through the teeth, peristome, that encircle 

 the mouth of the capsule. 



effectually as the seta of the hepatics and mosses (Fig. 203, 5). 

 The spores are freed by the forcing off of a circular lid, the 

 operculum, as is the case among the majority of the mosses 

 (Fig. 203, 0). This is effected by a ring of thin-walled cells, 



