CONFERVA PENNATA. 



C. filamentis ramofis; ramis pinnatis; pinnulis fub-oppofitis fub-hori- 

 zontalibus, approximatis, ftric"tis, diffepiraentis abfcuris, articulis 

 brevibus, tuberculis feffilibus fphiericis. 



C. pennata. Fl. Ang. p. 604. With. IV. p. 142. 



C. marina pennata. Ray, Syn. p. 59. 



In the Sea, on Rocks, Fuci and Corallines. Common in Ireland, Dr. Scott. 

 At Brighton, Mr. Borrer. Ifle of Wight, and Devonfhire and Cornifh Coaft, 

 not unfrequent, D. Turner. In Anglefea, Rev. Hugh Davies. About Scarbro'. 

 Travis. Near Forres in Elginshire, /. Brodie, Efq. On the Mumble Rocks 

 near Swanfea. 



THE prefent fpecies, though far from uncommon, appears to have been re- 

 markably ill underftood in general, and confounded by mod Botanifts with fmall 

 varieties or broken pieces of Conferva fcoparia. Dr. Roth in the fecond Fafci- 

 culus of the Catalecta Botanica has referred it to his Ceranium pennatum, but 

 in the third Fafciculus he corrects this error, and carries it properly to his C. 

 cirrofa, with the defcription of which it does not however altogether accord. 



C. pennata fometimes grows on rocks, but mod frequently on fuci or coral- 

 lines, in bufhy tufts varying from half an inch to two inches in length; the 

 color is olivaceous, becoming brown with age ; the ftems are twice or thrice 

 branched, but excepting the ultimate fcries the branches can hardly be called 

 pinnate; the pinna?, which are long and fomewhat thorn-like, iflue almoft at 

 right angles from the branches; their mod natural difpofition appears to be 

 oppofite, and in fome plants two of them regularly iffue from each alternate 

 joint, but in this refpecl they aro liable to great variation; the difTepiments arc 



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