28o 



SPOROPHYTE OF ANTHOCEROS 



lution and has finally reached a point where it only needs to 

 come in contact with the soil to become an independent plant 

 since it is provided with all the tissues necessary for photosyn- 



FiG. 199. 



Fig. 200. 



Fig. 199. Section of a young sporophyte of Anthoceros emerging from 

 the involucre-like outgrowth of the thallus — sp, dome-shaped spore form- 

 ing layer of cells; ch, chlorenchyma with stomata; b, foot or absorbing region; 

 c, region of growth. At right, surface view of stoma. 



Fig. 200. A common moss, Funaria: A, two plants with root-like rhi- 

 zoids at base and radially arranged leaves. Rising above the leaves are 

 the stalks or setae and capsules of two sporophytes. B, magnified view of 

 a plant, showing the early appearance of the sporophytes as a delicate stalk 

 still covered by the enlarging archegonium or calyptra. C, a plant bearing 

 antheridia in a rosette of leaves at apex of stem. D, enlarged view of the 

 upper portion of the sporophyte, showing the twisting of the stalk that assists 

 in sifting the spores through the fringe of teeth, peristome, that encircles the 

 mouth of the capsule. 



thesis and absorption. Note also that the growth of the sporo- 

 phyte is becoming more prolonged, that the spore mother cells 



