107 



var. platyloha B0rgs., ]. c. Fig. 86. 



Different from var. typica by having broader (up to 40 cm. 

 broad) joints and, especially the younger ones, being only very 

 little calcified. As to the anatomical characters var. platyloha 

 agrees very well with var. typica, only the peripheral utricles seen 

 from above seem to be a little larger in this form than in var 



Fig. 86. HaUmedn discoldea Decaisne var. platyloha Borgs. 

 A young plant with new joints above. (About 1:1). 



typica. Compared with var. platydisca of H. Tuna in external 

 habit the two forms show great agreement, nevertheless some 

 lesser differences are present ; of these may be mentioned that the 

 thallus is thinner, more greenish and less calcified in var, platy- 

 loha than in var. platydisca, just as the surface of the joints seems 

 to be a little smoother in var. platyloha, more uneven in var. platy- 

 disca. But in the anatomical characters, as stated before, the two 



