3°4 



PART IV. VEGETABLE TAXONOMY. 



THE FLORIDE^E, OR RHODOPHYCE.<E. 



This group includes the red or violet-colored algae, popu- 

 larly known as " Sea-Mosses," or Red Marine Algae. They are 

 exceedingly numerous in species, and are widely distributed in 



Fig. 503 



Fig. 504. 



Fig. 502. — Female conceptacle of Fucus versiculosus, producing on its interior hairs 

 and oogonia. Magnified about 40 diameters. 



Fig. 503. — One of the branching filaments from a male conceptacle, bearing anther- 

 idia, a. Magnified about 150 diameters. 



Fig. 504. — Escaped oospherefrom one of the oogonia, with ciliated antherozoids swarm- 

 ing about it. Magnified about 400 diameters. 



ocean waters. A few also, as Batrachospermum and Bangia, 

 inhabit fresh-waters. The marine forms mostly grow attached to 

 rocks or shells below the level of low tide. They are chlorophyll- 

 plants, but the proper green color is more or less obscured by 

 the presence of a red or violet coloring matter. In the simpler 

 forms the thallus consists of branching filaments ; in others it 



