HOW TO KNOW THE SEAWEEDS 



114a Plants with terminal conceptacles. Fig. 151 A 115 



1 14b Plant without terminal conceptacles 116 



1 15a Branching dichotomous. Fig. 151 / 



ania 



Fig. 151. Jania tenella Kiitzing 



A. Two kinds of terminal concep- 

 tacles: antheridial on the left, tetra- 

 sporangial on the right, X 18. B. A 

 small upper part of a plant showing 

 the subcylindrical segments and the 

 dichotomous branching, X 18. This 

 is a delicate but common epiphyte 

 of our warmer waters along southern 

 California. This and a number of 

 other species are found along the 

 Atlantic Coast from North Carolina 

 southward, but /. capiUacea Harvey 

 will most commonly be found. It is 

 a very delicate, regularly dichotom- 

 ous plant which is usually entangled 

 and mixed with other algae rather 

 than in pure growths. Its branches 

 may be as little as 50 to 100 yu. in 

 diameter. 



Figure 151 



116 



