114 



A TEXTBOOK OF THEORETICAL BOTANY 



Zoosporangium 



% 

 t. 



■3517 





V 



I ^ » 







Fig. 94. — Ectocarpus sp. Branch with zoosporangium 

 containing zoospores. 



/ 



Gamttangium 



Fig. 95. — Ectocarpus sp. Branch with gametangium. 



only gametangia, which produce gametes that fuse in pairs. They may 

 therefore be considered as true gametophytes. Diploid plants, on the other 

 hand, may produce both gametangia and zoosporangia (Fig. 96). In this 

 case the products of the gametangia are diploid and germinate without 



