Ser. Melanosperme.e. Yam. Laminariea. 



Plate CCLXXXIX. 



LAMINARIA SACCHARINA, Lamour. 



Gen. Char. Frond stipitate, coriaceous or membranaceous, flat, undivided 

 or irregularly cleft, ribless. Fructification, cloudy spots of spores 

 imbedded in the thickened surface of some part of the frond. La- 

 minaria [Lamour.), — from lamina, a thin plate, in allusion to the 

 flat frond. 



Laminaria saccharina ; stem cylindrical, filiform, expanding into a carti- 

 laginous or submembranaceous, lanceolate, undivided frond. 



Laminaria saccharina, Lamour. Ess. p. 22. Lyngb. Hyd. Dan. p. 21. t. 5. 

 Ag. Sp. Alg. vol. i. p. 117. Ag. Syst. p. 272. Hook. Fl. Scot, part 2. p. 98. 

 Grev. FL Edin. p. 282. Grev. Alg. Brit. p. 32. Hook. Br. Fl. vol. ii. p. 272. 

 Wyatt, Alg. Damn. no. 54. Harv. in Mack. Fl. Hib. part 3. p. 1 71. Harv. 

 Man. ed. 2. p. 30. Endl. 3rd Suppl. p. 27. J. Ag. Sp. Alg. vol. i. p. 134. 

 Kiitz. Phyc. Gen. t. 24. f. 1. Kiitz. Sp. Alg. p. 574. 



Laminaria latifolia, Ag. Sp. Alg. vol. i. p. 119. Ag.Syst. p. 272. Grev. 

 Alg. Brit. p. 34. Fort, et Rupp. p. 10. Kiitz. Syst. Alg. p. 575. 



Fucus saccharinus, Linn. Sp. PI. p. 1630. Fl. Lapp. p. 364. Gm. Hist. Fuc. 

 p. 194. t. 27 & 28. Huds. Fl. Angl. p. 578. Light/. Fl. Scot. vol. ii. p. 940. 

 Good, et Woodio. Linn. Trans, vol. iii. p. 151. Turn. Syn. vol. ii. p. 198. 

 Turn. Hist. 1. 163. Esper, Ic. Fuc. vol. i. t. 24, 56, & 57. Stack. Ner. 

 Brit. t. 9. E.Bot. 1. 1376. Fl.Dan. t.416. 



Hab. Attached to rocks and stones near low-water mark, and to the 

 depth of five to ten fathoms. Perennial. Very common all round 

 the coast. 



Geogr. Distr. Abundant in the Northern Ocean, extending round the world. 

 Atlantic shores of Europe, as far as the south of France, and of North 

 America as far as the Chesapeake (at least). 



Descr. Root consisting of several dichotomously branched, clasping fibres, ex- 

 tending from the base of the stem in a conical form, and fixed to the rock 

 by discs or fibrils from their lower surface. Stem sometimes a few inches, 

 sometimes several feet in length, from a quarter to half an inch in diameter, 

 cylindrical, compressed above, and dilating into the base of a terminal, 

 simple lamina. Lamina from one to six or even ten feet in length, and 

 from two to twelve inches or more in breadth, lanceolate, acute or obtuse, 

 sometimes much acuminated at the point; ovate at base when young, or 

 more or less cuneate, rarely attenuate; the margin sometimes nearly flal 

 and even, sometimes undulate or very much curled ; the centre thicker and 

 more opake than the rest of the frond, and sometimes strongly rugose, with 

 \\a\y transverse ribs, sometimes furrowed longitudinally at one surface of 

 the frond and ribbed at the other, or variously bullated. Rectification, 

 according to Turner, occupying irregularly shaped -put-, in the centre of 



VOL. III. 



