CRYPTOGAMIA ALG^. 971 



laciniated on the margins, fo as to refemble, 

 1 in feme meafure, a Lettuce-leaf; growing either 



fingle ; or in clufters, eretft, or reclining on each 

 other. 



p, A variety of this fometimes occurs in frefli-water 

 ditches and niarfhes, of a ftill thinner fubftance 

 than the preceding •, fo tender and flippery as 

 to be held in the hand with difficulty, of the 

 fame color with the foregoing, but not fo large. 

 This rifes to the furface of the water in the 

 fpring, turns to a yellow-green color, and be- 

 comes bloated with air-bubbles, as if in a ftate 

 of fermentation. See its figure in Dillen. mufc. 

 43- /• 8. /. 2. 

 Frefh-water Laver. AngUs. 



y\ The ULVA latijima. Lin. Sp.pl 1632. n. 4. is 

 aflerted by Gmelin, in his Hijl.fucor. p. 217. to 

 be only a large variety of the ULVA la^uca, 

 juft defcribed. PofTibly it may be fo -, but may 

 it not be the FUCUS Jaccharinus^ var. |3. de- 

 fcribed by us ? which fee above. 

 The Oyfler-Green is eaten in the lame manner as 

 the ULVA iimbilicalis^ n. 2. both in England 

 and Scotland, but the lad of the two is gene- 

 rally preferr'd, where both are found. 

 The Iflanders afcribe to it an anodyne virtue, and 

 bind the leaves about the front and temples to 

 5 , affuage 



