the Bi iiij}} Fuel, wUh parttcidar Defer iptiom of each Species, 22 £ 



69. FUCUS PURPURASCENS. 



F. fronde filifoimi ramofifTima, ramulis fetacels fparfis ; tuber- 



culis fiibrotuiidis innatis* 

 Herb. Buddie, 



R, Syn. p. 50. «. 51. F/. Aug. p. 589. Withering^ vd. 3. p. 259. 

 F. tubeiculatus. Fl. Scot, p. 926. 

 Habitat in rupibiis et faxis lub-marinis ubiqiie. 

 Adhaeret faxis fibris aliquot craflTiul'culis — Frons fiiiformis^ teres, 

 cartilaginea tenera, pedalis et ultra, craflltie pennae corvinae, conti- 

 nua; ramis nunc oppofitis, nunc alternis, plcrumque autem fparfis 

 inftrufta — Raini infcriores longiores, fupremi breviffimi ; ramulis 

 numerofifllmis fparfis, nonnunquam etiam confertis tenuioribus 

 veftiti — Ramulis per intervalla innata funt tubercula fubrotunda 

 feminifera a fe invicem diftantia — Color purpurafcens, aut ex pur- 

 pureo et virefcenti-albefcens. 



This fpecies differs from all its affinities by its fruftification, 

 which confifts of roundifh, or fometimes oval fwellings, placed at 

 fomc diftance from each other on the fmallefl: branches, and 

 which, when the plant is mature, may be obi'erved to be filled with 

 blackifh purple feeds, Thefe are never terminal, as defcribed by 

 Gmelin ; for, when they appear to be fo, there may always be ob- 

 ferved a fubulate procefs, which is, in faiSf, the extremity of the 

 branch extended beyond the tubercle. 



The fruilification of this plant is truly an innate tubercle, which 

 occupies the central part of the branch, and, as it fwells, caufes 

 that to dilate, and to form the gouty knot which is externally ob- 

 fervable. The fubftance of the branch is no ways altered by this 



Vol. Ill, G g procefs, 



