HOW TO KNOW THE SEAWEEDS 



136a Ultimate thallus parts fan -shaped, usually with some concentric 

 hair lines. Fig. 175 Zonaria 



Fig. 175. Zonaria failowii Setchell 

 <St Gardner 



A small terminal part of a plant 

 to show the fan-shaped ultimate 

 thallus parts, the curved hair lines, 

 and several irregular patches of 

 aplanospores, X 2.7. This is a 

 common plant of intertidal pools 

 in southern Cahfomia. At least 

 two other species may be en- 

 countered abundantly in some 

 locahties from North Carolina to 

 Florida. 



Figure 175 



136b Not as above, the whole thallus often flobellate in outline, but 

 not the individual iiltimate ports; concentric lines absent 137 



137a Tetrasporangiol sori occurring on any part of the blade. Fig. 176. 

 Hymenena 



Fig. 176. Hymenena tlabelligeTa (J. 

 Agardh) KyHn 



A small, upper portion of a fertile, 

 asexual plant showing the system 

 of delicate veins and a number of 

 elongate tetrasporangiol sori, X 1. 

 This is one of several species which 

 occur at lowest intertidal levels and 

 below along the Pacific Coast from 

 central CaUfornia to Puget Sound. 



Figure 176 



134 



