MOEPHOLOGY OF BEPKODUCTIVE OEGANS 231 



radiating rib-lilve branches spreading out from the axis. The 

 archegonia are here surrounded by modified leaves constituting 



Fig. 499. 



Fig. 500. 



Firj. 499. Portion of tbe tballus of ilur- 



chantia bearing antberidial braucb. 



Fig, 500. Arcbegonial brancb of A/tir- 

 chantia. pe. Pericbsetium. 



the perichmtium. A less evident specialisation is seen in the 

 Mosses and Ferns. Generally in the former, both antheridia 



Fig. 501. 



Fig. 501. Vertical section tbrougb apex of male plaut of a Mosa, Mnium Jwrnum 

 (x40). a». Antberidia. i?ar. Parapbyses. 



and archegonia occupy the summit of special leaf-crowned 

 branches, and are surrounded by hairs of curious form known 



