CONFERVA EBENEA. 



C. filamentis ramofis, ereftis, aaefpitofis, brevibus, rigidis, fub-car- 

 tilageneis ; ramis ramulifque obtufis 5 articulis diametrum longitudine 

 aequantibus ; diffepimentis contra&is. 



Conferva nigra. Roth, Cat. Bot. III. p. 299. 



Byffus nigra. Fl. Ang. p. 606. Fl. Scot. p. 1003. With. IV. p. 144- 



Fl. Germ. III. parf 1. p. 567. 

 By Mils petrea nigerrima fibrofa. Dill. Hid. Mufc. p. 9. t. 1. f. 18. 



Byffus minima faxatilis nigra ramofiffima, &c. Micheli. Gen. Plant, p. 212. 

 Tab. 90. f. 5. & Byffus cxfpitofa nigra, &c. p. 211. Tab. 90. f. 7. ejufd. lib. 



Byffus nigra velutina. Hall. Hift. p. 2104. 



On Rocks and Trees. Dillenius.—On Rocks in the Highlands. James BroJie, 

 Efq.—On the Stump of a Tree in Mackbeth's Wood, at Brodie, near Forres, 

 N. B. W. J. Hooker, Efq.— On Birch Trees, at Coftefy near Norwich. Mr. 

 S. Wilkins. 



C. EBENEA, accompanied by the accurate drawing, which is reprefented 

 in the annexed plate, was obligingly communicated to me by my friend Kir. 

 Hooker, who, in company with Mr. Turner, gathered it near Forres, in Scot- 

 land. Authentic fpecimeos with which I have been favored by Sir Thomas 

 Frankland and the Rev. Hugh Davies, prove that Hudfon's Conferva nigra, 

 refpefting which I had previoufly been accuftomed to yield to the generally 

 received opinion of its being the fame as Fucus fruticulofus, is in reality the 

 C. atro rubefcens of this work. In confequence of this it became neceffary to 

 change the name given to the fpecies here figured by Dr. Roth, who in the 

 third Fafciculus of his Catalecla Botanica has, with great propriety, removed 

 the plant from the Byffi to the Confervx, but has retained the fpecific name of 



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