^53 CRYPTCGAMIA ALGi^. 



This vegetable, by irs place of growth, Indicates 

 the purell and mod limpid water. 



***** Filamentis geniculatis. 

 capillari$ CONFERVA fiiis geniculatis fimpliCibus, arti- 

 ^7" culls alternatim comprclTis. Sp, pi. 16^6, 



(Dilhn. niufc. 25. /. 5. /. 25. A. B.) 



Marfh Thread, or Thread Conferva. Anglis, 



It is found in marfhy ditches and Hagnant waters 

 near the fea-fide. 



This con flits of fimple unbranched threads, a 

 cubit long or more, full of joints, and of a 

 yellowifh green color. Thefe threads are va- 

 fioufly coil'd together, and fometimes float in 

 great quantities upon the furface of the water, 

 but are more frequently fufpended in the mid- 

 dle region of it. They are ufually of the fize 

 of fmall fewing thread, their joints very nu- 

 merous, and of a darker green than tiie inteiv 

 ilices, which are pellucid and tubular; and 

 often collapfe in alternate order, 

 la. There is a frnaller and (hortcr lind fometime- 



found ia ffefnwarer ditches, which fecms to bt 

 only a variety of the foregoing. See Dillen- 

 miijc.p. 16. L 5. /. 25. B. 



cora!iin& . CONFERVA nlis geniculatis dichotomis. Syft. 



iS. ndi, edit. 13. p. oiS. CONFERVA coralU*, 



6 ncideh 



