the Briti/fj Fuci^ with far licular Defer iptiotis of each Species, 199 



lenfi-ths, and not fafligiatcd or level ; from riiffufus, by having its 

 branches all blunted at the end, and fwelled by the fructification 

 included in them; and ivom p/icatust by its upright, fimplc and 

 unentangled growth. 



The plants found at the Ifle of Portland are ufually of humble 

 growth, and are well reprefcntcd by Dr. Withering's figure : but 

 at llfracombe in the north of Devonfhire they are of a much taller 

 fio-ure, and the divifions of the frond are very numerous. 



The fru£lifications are always at the ends of the branches, and 

 imbedded in the fubftance of them. The plant in a recent ftate 

 is always of a pale olive colour, but when dried it turns nearly or 

 quite black. 



It adheres to the firmeft rocks very ftrongly by means of a thick 

 leathery fubftance, from which feveralftalks fometimes arife in a 

 fort of clufter. We have never obferved it growing upon movea- 

 ble ftones, but only on the fixed firm rock. 



54, FUCUS FASTIGIATUS. 



F. fronde fiUformi dichotoraa ramofiflima ; ramis faftigiatis- 

 obtufis, angulis ramificationum fub-redtis. HerL Linn. Pe- 

 iiveryp. 31. n. 4. Morifon, Hiji. Ox. 3. p. 649. / 15. t. 9. 

 /. 9. Fl. Dan. 393. optima. 

 Var. Interceptus. Dichotomiis ultimis omnibus geniculato- 

 annulatis. 

 Habitat in ropibus et faxis marinis paflim— /S apud Cromer in 

 Norfolcia. 



Radix callus expanfus — fed frons ad bafin valde furculofa — Surcu- 



li ubi faxa attingunt difco novo explanato, qui radix alterius fit, fae- 



pius adherent, unde cauliculi plurimi conferti affurgunt— Hicauli- 



2 cull 



