Mr, Stackhouse'j Defcripticn of Ulva punftata. 237 



ObfervaHonu 



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

 or the membrane of Ulva umbilkalis* It arifes from a little knobby- 

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

 dicbotomous, the fegments broad, of an equal fize, forked obtufely. 

 Its colour is brown, and pellucid as a bladder. The fructification 

 covers the whole frond, in two rows of oblong patches, ftudded 

 thick with imall, round, dark-red granules. This plant has, 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 

 perfect:. Mr. Woodward, who has feen the fpecimen, thinks the 

 fructification too regular, as to fit nation on the frond, for the genus 

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

 Ulva, 



Hah Thrown on fhore on the fands at Weymouth, near the. 

 pier, at low-water mark, September 1792. 



XXI. OJ- 



