CONFERVA EQUISETIFOLIA. 



C. filamentis ramoffifimis ; ramis acuminatis elongatis fubfimplicibus ;■ 

 ramulis verticillatis brevibus dichotomis articulis ramulorum longis. 



C. equifetifolia. Fl. Scot. p. 984. With. IV. p. 133. 



C. multifida. Fl. Ang. p. 596. With. IV. p. 132. 



C. imbricata. Fl. Ang. p. 603. Roth, Cat. Bot. I. p. 189 ? 



C. verticillata. Roth in Schrader's Journal, III. p. 332 ? Schmidel Iter. t. 2. 



Mufcus marinus hirfutus, flagellis longuribus rarius divifus ruber. Hid. Ox. III.- 

 p. 650. f. 15. t. 9. f. 7. 



On Rocks and Stones in the Sea, not unfrequent. 



C. Verticillata and C. Spongiofa, already figured in this work, are very nearly 

 allied to the prefent fpecies ; its red clay color and acuminated branches, with 

 the conftantly dichotomous ramuli, and their long joints, will however readily 

 diftinguifh it. 



It is occafionally found on moft of the Britifh Coafts, generally more or lefs 

 covered with other Conferva; growing parafitically on it. The length is from 

 five to eight inches, the thicknefs nearly that of a crow's quill, and the color a 

 dull red; the ftem folitary and repeatedly branched; the branches are fubulate 

 and vary much in their difpofition ; in fome fpecimens they are numerous, fhort, 

 and branched, in others long and nearly fimple : in the fame plant they vary 

 alfo, as, though their difpofition is moflly alternate ; feveral together not infre- 

 quently iffue from the fame fide of die ftem. The ftem and branches are every 

 where clothed with a profufion of ramuli iffuing in whirls from the end of each 

 joint, which being longer than the joints are tiled on each other and give the 

 plant a very rough and fpongy appearance. In the ftem and branches the joints 



7 



