THE MARINE BOTANIST. 81 



GENERA OF THE ECTOCARPUS TRIBE. 



Cladosteplms, Stem not articulated, the ramuli 



alone jointed and set in whorls. 

 Sphacelaria. Stem articulated, branched. Ramuli 



distichous pinnated. 

 Ectocarpus, Stem jointed, very slender, hair-like, 



generally much branched and flaccid. 

 Myriotrichia, Stem unbranched; ramuli in whorls, 



tipped with transparent fibres. 



CLADOSTEPHUS. 



Name meaning a branch and a crown. 

 Frond inarticulate, rigid; whorled with short- 

 jointed ramuli. ^^ Fniit elliptical pedicellate. 

 Spores borne by accessory ramuli." 



CLADOSTEPHUS VERTICILLATUS.— 



WHORLED CLADOSTEPHUS. 

 From three to nine inches high, much branched, 



G 



