172 Dr. GooDENOUGH and ^xr. WoodwardV Ol^fervations on 



having never met with any thing which correfponds with hia 

 defcription. 



The conftant diftinclioii of this plant is the dichotonnous frond, 

 and the fmooth veficlc-hkc tubercles, placed irvegulaily towards the 

 fumraits of tlie frond. 



37. FUCUS CANALICULATUS. 



F. fronde dichotoma lineari, apicibus ohtufis tuberculofis. 

 Herb. Linn. P ether, p. 31. n. 2, 3. 9. Acl. Pari/. 171 1. 

 //. 11./. 5. radicem fnnStificationemque exhibct. Fl. Dan. 

 t. 214. optima. Gmdln^p. 73. t. i. h..f. 2. Morlfon, Hifi. 

 Oxon. 3. /. (ji\'].f. 15. /. 8./ 12. 

 F. excifus. h'mn. Sp. PI. 1627. — Canaliculatus. Syjl. FL Ang, 

 /. 583. Fl. Scot. p. 917. Withering, vol. 2„p- 250. 

 Habitat in rupibus et faxis fubmarinis. 



Radix callus expanfus — Frons fub ipfo ortu ramofa — Rami modo 

 nati faepe rupibus adhserent et novz fiunt plantas, unde plurimse 

 frondes ex eodem callo oriri vifs funt — Frons omnino dichotoma 

 canaliculata evadit — Apices ramorum obtufi, tumidi, tuberculofi — 

 ^///>Wo2—5uncialis— Co/or ex flavefcenti olivaceus — Subjlantia car- 

 til aginea — FruSiificatio, tubercula conferta apices ramorum occu- 

 pantia. 



Obf. Rami non revera canaliculati, at marginibus longitudinaliter 

 hinc contra£lis f. inflexis, fpeciem canaliculorum prae fe ferunt. 



The order we here eftablifh is perfeftly diftin£l. It agrees with 

 the order Fronde pland 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 canalitulation or groove being made m 



the 



