294 



COLLEGE BOTANY 



ered a thallus. It produces the erect, leafy shoots (gameto- 

 phores) with which we are familiar as moss plants. 



The stem of this gametophore consists of elongated paren- 



FIG. 142. (a) Mature moss plant; (6) capsule with calyptra; (c) capsule without calyptra; 

 (d) capsule with operculum removed showing peristome; (e) operculum, (/) archegonium; 

 (g) antheridium; (h) paraphyses or sterile organ. 



chyma cells, but there is no further differentiation into tissues 

 such as are found in the higher plants. The leaves are not true 

 leaves such as are found in the higher plants, but each leaf 



