9^8 CRYPTOGAMIA ALG^. 



This vegetable, by its place of growth, indicates 

 the puielt and moft limpid water. 



***** Filamentis geniculatis. 

 eapillaris CONFERVA f.lis geniculatis fimplicibus, arti- 

 '7* culls alternatim comprtflls. Sp. ft. 1636. 



(Dillen. mufc. i^.t. c^. f. 1^. K.'Q.) 

 Marlh Thread, or Thread Conferva. Anglis. 

 It is found in marfhy ditches and ftagnant waters; 



near the fea-lide. 

 This confifts of fimple unbranched threads, a 

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

 :..'•" . yellowifh green color. Thefe threads are va- 

 rioufly coil'd together, and fomctimes float in 

 , . great quantities upon the furface of the water, 



but are more frequently fufpendcd in the mid- 

 dle region of it. They are ufually of the fize 

 .. - of fmall fewing thread, their joints very nu- 

 •.r\ . merous, and of a darker green than the inter- 

 ftices, which are pellucid and tubular; and 

 often collapfe in alternate order. 

 ^, There is a fmaiier and (hortcr Vind fometimes 

 found in frefh-water ditches, which feems to be 

 only a variery of the foregoing. Sec ■ Dillen, 

 miffcp. 2 6. r. 5. /. 25. B, 



rcvalUna CONFERVA fills geniciilaf is dichotomis. Syjl. 



iS. run. edit, jc;, ^. SiS. COn^V.KVh coralli- 



6 noides. 



