188 SEA MOSSES. 



Diego, it becomes more and more common toward 

 the north. At Santa Cruz it is very plentiful. Its 

 habitat is upon rocks and other Algae between tides. 



Order. — HYPNE^. 

 Gex^us.— BYFNEA* Lam. 



Hypnea musciformis, Lam. 



The moss-like Hypnea is in many places south 

 of Cape Cod, a very common plant. I collected 

 it at Wood's Holl, but not very plentifully. Miss 

 Booth speaks of it as growing " by the acre," in 

 Peconic Bay. In California, as on the Atlantic 

 coast, it grows more common as you go southward. 

 It is not found north of Cape Cod. 



The frond is filiform, growing from a mat of 

 root fibres, on stones and shells, in deep water. 

 It grows in spreading bushy tufts to a height of 

 from three to seven inches. The main stem is as 

 thick as a sparrow's quill at base, thence tapering to 

 the size of a bristle at top. It is irregularly but 

 plentifully branched, especially in the lower part of 

 the frond, the branches spreading out widely in every 



* Hypnea, named from Hypnuma; genus of Mosses, 



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