CONFERVA AMPHIBIA. 



C. filamentis fub-aniculatis, ramofis denfiffime implexis ; ramis patenribus 

 remotis ; ramulis exficcatione coeumibus in aculeos ; diflepimentis 

 parum contractis, capfulis fcffilibus, fub ellipticis. 



C. amphibia. Sp. PI. p. 1634. Fl. Aug. p. 954. Fl. Scot. p. 979. Withering, 

 IV. p. 129. Roth, Fl. Germ. III. p. 1. n. 7. Cat. Bot. I. p. 16. II. p. 192. 



C. amphibia fibrillofa & fpongiofa. Dill. Hilt. Muic. p. 22. t.4. fig. 17. B & C> 



0. ramis elongatis. 



C. furcata £. Fl. Ang. p. 592. "Withering, IV. p. 128. 



Ceramium ccefpitofum. Roth. Fl. Germ. III. p. 1. p. 475. Cat. Bot. I. p. 154. 

 II. p. 186. 



Conferva paluftris filamentis brevioribus & craffioribus. Dill. Mufc. p. 17. t. 3. 

 f. 10. 



C. paluftris fub hirfuta filamentis brevioribus & craffioribus. Ray. Syn. p. 447. 



In fmall pools and mallow waters. &. in ftreams and deep waters. 



AMONG flowering plants we find feveral inftances of ftriking varieties pro- 

 duced by the more or lefs watery fituation in which individuals chance to grow, 

 and perhaps no Botanift would acknowledge the two moit oppofite varieties of 

 Myofotis fcorpioides, or Lotus corniculatus, to be the fame fpecies, without 

 an opportunity of tracing them through their feveral gradations. The fame may 

 be faid of the prefent plant, which has hitherto formed two fpecies, and it is 

 only after a careful examination that I have here arranged them as one. 



On the edges of ditches, and in fimilar fituations, it frequently occurs in 

 manes, fo denfely matted as to hold water like a fponge, with its furface befet 

 by ere£r. branches, which give it a very briftly appearance. In this ftate it is well 

 known to Botanifts as the C. amphibia of all modern authors. Its hue is a bright 

 green, becoming afh-colored with age. The root I have not been able to dif- 



