ihe Br It if) Fact, with particular Defcriptions of each Species. 151 



to be the difiichus of l.innrcus. From examining the Linna:an Her- 

 barium, and from Muii-ay's defcription of di/licbus in the SvJ}. Nat. 

 we are convinced that it is not a native of Britain. The dijiichus 

 is quite thin and herbaceous — the ceranoides ahvays membranaceous, 

 and of a firm texture. 



Tne branches have numerous fmall dots in rows on each fide of 

 the rib or nerve, as happens in ferralus and veficulofiis : it varies in 

 height from three inches to nearly, or perhaps quite, two feet. 



As the plant grows old, it lofes the membrane of the whole 

 lower part of the frond. In this cafe it has the property of put- 

 ting forth new branches, which, growing clofe to each other, and 

 from their multitude not very large, give the plant a pretty fringed 

 appearance. Before it has lofl: the membrane, this proliferous qua- 

 lity does not make its appearance. 



Mr. Lightfoot's defcription mentions its being only a few inches 

 in height. It is very probable that in certain fituations, and efpe- 

 cially when remote from frefli water, it may be of more humble 

 growth. 



25. FUCUS SACCHARINUS. 



F. fronde fimplice enfiformi. Herl>. Budd/e, p. 21. Petiver, 

 vol. I. p. 15. ^£1. Natures Curioforutn, vol. 8. p. 450. /. g.. 

 f. 2. Gmelin, /. 28. 

 Var. /3. bullatus — fronde buUata marginibus undulatis. Buddie^ 

 p. 22. Petivert vol. i. p. 16. Uvedale, vol. i. p. 14, 15. 

 A£i. Pari/. 1712. /). 29. /. 3. f. 4. Gmeliny t. 27. 

 Habitat in rupibus et faxis fubmarinis paflim. 

 Radix fibrofa — Frotis modo folitaria, modo gregaria ; nempe ali- 



quando 



