n8 Dr. Goodenough and Mr. Woodward'; Obfervatiom on 



Habitat in rupibus Infularum Jurae. D. Lightfoot. Inter rejecta- 

 menta maris apud Yarmouth Norfolcise legimus. 



Radix callus paululum explanatus — From triuncialis ex albo vire- 

 fcens, nonnunquam etiam rubefcens, tenera — Caulis teres, filifor- 

 mis, craffitie fili emporetici minoris, ramofus — Rami dichotomi, 

 fubdivaricati, caule vix tenuiores — Folia cylindrica utrinque atte- 

 nuata, nonnunquam bifida, fparfa, ad fuperiorem frondis partem 

 confertiffima, gelatinofa — Fruciijicaiio, tubercula numerofiflima, 

 minutiffirna, laete rubra, in foliis prasfertim fuperioribus fita. 



This fpecies is Sufficiently diftinguiihed from its affinities, ova/is 

 and dafyphyllus, in the defcriptions of thofe plants. That it has been 

 confounded with ovaiis cannot be doubted by any one who confi- 

 ders the defcriptions of Hudfon and Lightfoot, and compares them 

 with the account given by Gmelin in his FUJI. Fucorum (p. 162 — 

 186) of his two fpecies, vermicularis and polypodioides. Mr, Lights 

 foot's accurate defcription of vermicularis clearly points out this 

 plant; and though it was not necefTary for him to mark any dis- 

 tinctions between this and Mr. Hudfon's ovaiis, it is certain he con- 

 fidered them diftincT:, from his not quoting ovaiis as a fyncnym, or 

 taking any notice of Gmelin' 's polypodioides. 



The Shape and growth of the leaves very much refemble the 

 Sedum album of Linn, as obferved in Fl. Scot. ; and this has induced us 

 to give to this fpecies the trivial name oifedoides, inftead of the un- 

 meaning one of vermicularis, which had been adopted from Gmelin. 

 The whole plant is more tender and gelatinous than ovaiis, and 

 the fructification differs confiderably, confiding of extremely mi- 

 nute red tubercles, placed on the leaves, particularly the upper 

 ones, and Scarcely riling above the furface. In this circumftance 

 it nearly approaches the genus Viva ; but when it is confidered that 



the 



