KEY TO THE GENERA. 



BRIGHT GREEN ALG^E. 



I. Frond Membranous. 



i. Color Green. 



{a.) Frond, wide, long and thin, the largest 



green Algae. 



Ulva. 



(b.) Frond, narrow, sometimes inflated, always 



tubular. 



Enter o?norpha. 



2. Color, Brown or Purple. 



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



Porphyra. 

 II. Frond Filiform. 



i. Frond Utibranched. 



Sometimes attached, straight and single, 



sometimes floating, kinked and matted 



like wool. 



Chcetomorpha. 



2. Frond Branched. 



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



single cell, not jointed. 



Bryopsis. 



(J?.) Stem and branches jointed, that is, 

 composed of short single cells at- 

 tached end to end. 



Cladophora. 



