172 Dr. GooDEKOUGii and Mr \ Woodward^ Obfervations on 



having never met with any thing which correfponds with hi* 

 defcription. 



The conftant dilKnclion of this plant is the dichotomous frond, 

 and the fmooth veficle-like tubercles, placed irregularly towards the 

 fummits of the frond. 



37. FUCUS CANALICULATUS. 



F. fronde dichotoma lineari, apicibus obtufis tuberculofis. 

 Herb. Linn. Petiver, p. 31. n. 2, 3. 9. Act, Pari/. 171-1, 

 ph 11. f. 5. radicem frudtinxationemque exhibct. Fl. Dan. 

 t. 214. optima. Gmelin, p. 73. t. I. A.f. 2, Mori/bn, Hijl. 

 Qxon. 3. p. 647./ 15. t. 8.f. 12. 

 F. excifus. Linn. Sp. PL 1627. — Canaliculars. Sjft. FL Ang. 

 /. 583. FL Scot. p. 917. Withering, vol. 3,/. 250. 

 Habitat in rupibus et faxis fubmarinis. 



Radix callus expanlus — From fub ipfo ortu ramofa — Rami modo 

 nati fspe rupibus adherent et novae fiunt plantae, unde plurimae 

 Irondes ex eodem callo oriri vifae funt — From omnino dichotoma 

 canaliculata evadit — Apices ramorum obtufi, tumidi, tuberculofi — 

 Aititudoi — 5uncialis— Color ex flavefcenti olivaceus — Subjlantia car- 

 tilaginea — Fructificatio, tubercula conferta apices ramorum occu- 

 pantia. 



Obf. Rami non revera canaliculati, at marginibus longitudinaliter 

 bine contraclis f. inflexis, fpeciem canaliculorum pras fe ferunt. 



The order we here eftablilh is perfectly diftinct. It agrees with 

 the order Fronde plana avenid in having no nerve, but differs from it 

 in being channelled on one fide, and not flat or plain. This appear- 

 ance arifes not from any canaliculation or groove being made in 



the 



