Mr. STACKHOusii'j Defcript'ton of Ulva pttn^ata. 237 



Obfervations. 



The fubftance of this rare plant is as thin as goldbeaters' fkin, 

 or the membrane of Ulva umbi.'icjlis. It aril'es from a httle knobby 

 root, flat at bottom ; and grows in a crowded mafs. It is perfectly 

 dichotomons, the fegments b;ond, of an equal fize, forked obtufely. 

 Its colour is brown, and pell'irid as a bladder. The fruftification 

 .covers the whole frond, in two 1 ows of oblong patches, ftudded 

 thick with fmall, round, dark- red granules. This plant hns, I 

 believe, never been noticed ; it is, probably, a native of deep wa- 

 ters, and, from the delicacy of its texture, feldom thrown on Ihore 

 perfcfft. Mr. Woodward, who has feen the fpecimen, thinks the 

 fructification too repular, as to fituation on the frond, for the genus 

 Uhn ; otherwife it would fall under his divifion of Fruit-bearing 

 Ulva. 



Hab. ■ Thrown on fliore on the fands at Weymouth, near the 

 pier, at low-water mark, September 1792. 



XXI. 0^- 



