146 Dr. GoODENOUGH afiJ Mr. Woodward'^ Ohfervations on 



1. In the firft variety the vcficlcs are ranged on each fide of th& 

 rib throughout the frond, and aUb at the axillx. The frond itfelf 

 varies in having its branches from a quarter of an inch to a full 

 inch in breadth, with edges either plane or undulated as in fpiralis. 

 The ends of the branches when in frudification are fwoUen and 

 fomewhat acute. 



2. The variety divar'tcatus is remarkable for having the bladders 

 in fome of the axilla; (for it is by no means conftant in all) ex- 



'tremely dilated, as if two veficles had been confluent into one ; 

 in conl'equence the branches fork off wider than ufual, and become- 

 divaricated. We have not obferved this variety in fructification ; 

 in Southampton river we have feen it fomewhat twifted. 



3. The variety irtflatus is occafioned by a difeafe. By fome means or 

 other a body of air is introduced between the two coats of the frond, 

 and thus gives it a bladder-hke appearance. That it is accidental 

 is evident, from its not happening ufually in more than one or 

 two branches in any given plant. 



4. The variety acutus we focall from the lanceolate terminations, 

 of its branches. The fame plant, however, occafionally furnifhes 

 lanceolate terminations, and others fomewhat bluntifh. 



5. We can fcarcely call foliaceus a variety ; it is merely a plant 

 which, in the vigour of its growth having been broken off by fome 

 violence, endeavours to repair itfelf in an irregular manner, pro- 

 dxicing cluftcrs of new branches refembhng obovate leaves. Thefe 

 are principally from the broken extremities ; but they are alfo found 

 on the fides, and even upon the expanded root. As in ceranoldesy 

 this proliferous tendency does not take place unlefs th.e membrane is 

 torn off. It differs from the firfl variety 'in no other particular. 



6. This is the volubilis of Mr. Hudfon. It cannot however be 

 called a diflinit fpecies ; for its form is the fame" nearly as the firft^ 



only 



