KET TO THE GENERA. 127 



(i.) Main stem mostly undivided, bare at 

 base, clothed above with simple un- 

 branched ramuli. Halosaccion. 



(ii.) Robust, coarse, profusely branched, 

 branches often ending in twining 

 tendrils, dull brown or purple, very 

 common ; six to ten inches high. 



Cystoclonium, 



(iii.) Smaller, finer, branches shorter, full red 

 or pink, rare. Gloiosiphonia. 



(<^.) Plants without leading stem. 



(i.) Large, smooth, robust, two or three times 

 divided ; ramuli long, slender at point, 

 slightly curved ; reddish purple to pink ; 

 prominent fruit vessels in ramuli. Plant 

 six to twelve inches high. Rhabdonia. 



(ii.) Small, slender ; ramuli long, curved ; 

 beautiful delicate pink. Plants three 

 inches high. Lo7ne7itaria. 



(iii.) Larger, brownish, slender or robust ; 

 branches long, ramuli very short, often 

 minute. Chondriopsis. 



(iv.) Slender, brown, branches long, bare and 

 hooked at the ends ; ramuli short. 



Hypiiea. 



