n6 PODOSTEMACEAE [CH. 



distant in relationship from one another, and adds, "it is 

 impossible at present to do more than point out these very 

 suggestive analogies of form which accompany analogy of the 



FIG. 79. Dicraea stylosa, Wight. Plant somewhat reduced, showing the shoots 

 (g, g) arising from the band-like root thallus. [Warming, E. (18832).] 



conditions of life, and which seem to indicate that an experi- 

 mental and comparative morphological study of the forms of 

 the Algae and Podostemaceae should be attended with inter- 



