CONFERVA CRISPATA. 



C. filamentis ramofis denfiffime implicatis, crifpatis ; ramis alternis remo- 

 tiffimis; articulis cylindraceis Iongitudine diametrum mulioties 



fuperantibus, ficcitate alternatim compreffis. 



C crifpata. Roth. Cat. Bot. I. p. I?8 . III. p . 2?5 . FIora Germanica. III. 

 pars. i. p. 508. 



In ditches and pools, about Newton Nottage, Glamorganfhire. IF. IF. Young. 

 Alfo about London and Yarmouth. 



I HAVE gathered C. crifpata in the neighbourhood of London and Yarmouth, 

 and Mr. Young has brought it from the vicinity of Newton Nottage, but I do 

 not think that it is of fuch frequent occurrence as mod of the other fpecies. It 

 generally grows in ftagnant water, and floats in large entangled maffes on the 

 furface. The filaments are of a dark green, wholly deftitute of glofs, and from 

 fix or eight inches to a foot in length ; they are repeatedly divided in a fomewhat 

 dichotomous manner by alternate branches, which are always difpofed at a great 

 diftance from each other; the joints are cylindrical, and in length many times 

 greater than the diameter. In the older plants, the fporangium, or internal tube, 

 which contains the granular fubftance, fuppofed by Dr. Roth to be the feeds, 

 frequently contract fpirally. This appearance is not however sufficiently general 

 to authorize its introduction into the fpecific character, as Dr. Roth has done in 

 the firft and fecond, but very properly omitted to do in the third fafciculus of 

 his highly interefting Catalefta Botanica. When dried the joints become 

 alternately comprefied. 



The diffimilar mode of ramification, and length of the joints readily diftin- 

 guifh this fpecies from C. frada ; and from C. amphibia 13, to which it bears 

 moft refemblance, it may be at once known by its far different joints. 



*3- 



