RED ALG^E. 209 



Halifax, and in northern regions generally. It differs 

 from the last in having a much less branched stem, 

 and a much broader and larger leaflet. Yet this is 

 very variable both in size and form. But the frond 

 is much more simple, and of a somewhat more robust 

 habit than P. membranifolia. The leaflet is deeply 

 lobed, but all the segments keep their wedge-shaped 

 outline, and are themselves indented at the top. The 

 color is a clear, strong red. It grows in deep water, 

 and is a perennial. I have never collected it. Mr. 

 Collins finds it occasionally at Nahant, in October, and 

 Mrs. Davis finds it in the fall, on the open beaches, 

 about Gloucester, after a storm. It has been found 

 as a rarity, by Miss Booth, washed ashore at Orient. 

 It has the same geographical range as the other species. 

 Neither of these plants adhere to paper, nor are they 

 especially interesting to the general collector. 



QkQx\\x% — GYMNOGONGRUS,'' Mart. 



This genus is represented by one species on the 

 Atlantic and three on the Pacific coast, in our flora. 



Gymnogongrus Norvegtcus, Ag. 

 The Norway species is reported at many places 



Gymnogongrus = Naked warts, seed vessels. 

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