75 



LAMINARIACE.E 



General Characters. As in the Splaclmidiacew, 

 the only known reproductive organs are zoospores 

 formed within unilocular sporangia. These occur 



FIG. 12. Alaria egculenta, much reduced, o and b, tufts of hairs from 

 young frond, c, cryptostoma of Saccorhiza bulbosa. a, b, c, much magnified. 



together with non-septate paraphyses, not within 

 conceptacles, but in sori. Except in the case of 

 Chorda, where the sorus covers the whole surface of 



