CRYPTOGAMIA ALGiE. 919 



Moris, hifi. Ox. p. 6^j. feoi. 15. t. 2. f. 2. or- 

 dinis medii, Reaumur, a^. Gall. lyii. p. 26. 

 /. 31. Bajler. opufc. VI. p. 121. /. 11. /. 5. 

 Oed. Dan. t. 146. C;«^/. hifi. fucor. p. ^8. 

 /<^^. I. B. fig. I. ^/ var.fig. 2.) 



Knobbed Fucus. Sea-Whiftles. Anglis. 



Upon rocky fliores common. VII. VIII. 



The Ilalks of this fpecies are commonly about 

 two ittz long, and nearly a quarter of an inch 

 ■wide ; but are found, from a foot to two yards 

 in length, lying procumbent on the rocks ; 

 their fubftance hard and cartilaginous ; their 

 color olive when frelh, but blackiOi when dry. 



Thefe Ilalks are linear, comprefs'd, and generally 

 dichotomous, but fometimes the branches grow 

 pinnated. They are furni(hed with flat, felTile, 

 wedge-fhaped, or oblong blunt leaves, about 

 half an inch in length, growing diftichous out 

 of the edges of the fialks, either oppofite or 

 alternate, and either one, two, three or more, 

 from the fame bale or focket. 



Thefe leaves, in the frudified flate, become tur- 

 gid at the extremities, and full of Mucus, in 

 which are imbedded numerous fmall grains or 

 feed-bearing capfules. 



In the middle of the ftalk and branches grow, one 



above another, at unequal diftances, large oval 



hollow air-bladders, wider than the ftalk itfelf, 



N n n 4 and 



