KEY TO THE GENERA. 



BRIGHT GREEN ALG^. 



I. Frond Membranous. 



I. Color Green. 



(^,) Frond, wide, long and thin, the largest 



green Algse. ^/ C" 



Ulva, ^ Ip- 



{b?) PVond, narrow, sometimes inflated, always 



tubular. 



Enter omorpha. 



2. Color, Brown or Purple. 



Frond, thin, translucent, sheeny, satin-like. 



Porphyra. \ ^ 



II. Frond Filiform. b«5^ 



I . Frond Unb ranched. 



Sometimes attached, straight and single, 



sometimes floating, kinked and matted 



hke wool. ^ , 



Chcetoino7pha. !)•' 



2. Frond Branched. 



{a.) Stem and (straight) branches each a 



single cell, not jointed. 



Bryopsis. 



(b.) Stem and branches jointed, that is, 

 composed of short single cells at- 

 tached end to end. 



Cladophora. p 



