CRYPTOGAMIA ALG^. 965 



almofl cylindrical. About thefe ftalks, at in- 

 tervals of one quarter of an inch, grow in 

 whirls three, four, or five fubulate branches, 

 an inch or more long, but gradually fliortened 

 in each whirl towards the fummit of the ftalk. 

 Thefe branches are befet with fetaceous liga- 

 ments, growing alternate, or without order. 

 The fructifications are fmall red feeds, vifible with 

 a microfcope in the ligaments and fummits of 

 the branches. 



F. fronde filiformi fimplici fubfragili opaca. Lin. 

 Syjl. nat. edit. 13. ^. 815. S^.fl. 1631. (Boccon. 

 muf, I. />. 271. /. 7. /. 9. Petiver. Ga-z. /. 91* 

 /. 5. opt.) 



Thread Fucus, or Sea Laces. Anglis, 



Upon the fea rocks, and waving under the water 

 like long firings, frequent on many parts of 

 the coaft. 



The fubllance of this is opaque and cartilaginous, 

 but not difficult to be broken. The color when 

 recent a dull olive-green, when dry, fufcous, 

 or nearly black \ and, when expos'd for feme 

 time on the fliores to the fun and air, it be- 

 comes yellow, flraw-color'd, or white. 



It confifts only of a fimple, unbranched, naked, 



cylindrical ftalk, three or four yards long, more 



or lefs v from the fize of a large fiddle-ftring to 



Q^q q i that 



