Ser. MELANOSPEEMEtE. ( 55 ) Fam. LxVMlNARI^ 



Plate CXLIX. 

 LAMINAEIA SACCB.AB,m A.— Lamour 



Gen. Char. — Frond stalked, coriaceous or rarely membranaceous, flat, without a midrib. 

 Fructification : spores collected in spots or sori under the surface of some part of 

 the frond. Name from lamina, " a thin plate." 



Laminaria saccJiarina. — Root consisting of many strong, branching 

 fibres ; stem cylindi'ical, smooth, suddenly expanding at the apex into an 

 elongate, lanceolate, acuminate, submembranaceous, entire, much crisped 

 frond. 



Laminakia saccharina. — Lamour. Ess. p. 22 ; Lyngi. Hijd. Dan. p. 21, t. 5 ; 

 Ag. Sp. Alrj. 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; Hooh Br. Fl. 

 vol. ii. p. 272; Wyatt, Alg. Danm.No. 54; Endl. 3rd Suppl. p. 27; 

 /. G. Agardh, Sp. Gen. Alg. vol. i. p. 132 ; Kiitz. Phyc. Gen. t. 24, 

 f. 1 ; Kiltz. Sp. Alg. p. 574; Harv. in Mach. Fl. Hih. part 3, p. 171 ; 

 Harv. P. B. plate 289 ; Harv. Man. p. 30 ; Harv. Syn. p. 27 ; Atlas, 

 plate 7, fig. 28 ; Harv. N. B. A. part 1, p. 92. 



Laminakia latifolia. — Ag. S}'). Alg. vol. i. p. 119 ; Ag. Syst. p. 272; Grev. Alg. 

 Brit. p. 34 ; Post. & Rupp. p. 10 ; Kiltz. Syst. Alg. p. 575. 



Fpous saccharinus. — Linn. Sjy. PI. p. 1630 ; Fl. Lapp. p. 364 ; Gmel. Hist. Fuc. 

 p. 194, t. 27 and 28; Huds. Fl. Angl. p. 578; LigJitf. Fl. Scot. 

 vol. ii. p. 940 ; Good. & Woodw. in Linn. Trans, vol. iii. p. 151 ; 

 Turn. Syn. vol. ii. p. 198 ; Tur^i. Hist. t. 163 ; Esper, Ic. Fuc. 

 vol. i. t. 24, 56 and 57 ; Stack. Ner. Brit. t. 9 ; E. Bot. t. 1376 ; 

 Fl. Dan. t. 416. 



Hae. — On rocks and stones from low-water mark to twelve fathoms. Perennial. Very 

 common. 



Geogr. Dist. — Northern Ocean, extending round the world ; Atlantic shores of Europe, 

 as far as the south of France ; and of North America as far as New Jersey. 



Description. — Root, a conical mass of stout, branching fibres. Stem 

 rather thickest at the base, slightly tapering upwards, cylindrical and 

 smooth, eight inches to a foot or more in length, and from a quarter to 

 half an inch in diameter, flattened at the apex, and suddenly expand- 

 ing into the frond, which is widest at the base, gTadually tapering to 

 the summit, where it is somewhat acute when entire, but is generally 

 more or less erose, especially in old plants, by the forcible detachment 

 of the old frond ; the margin in young plants nearly plane, but in old 

 ones always more or less crisped and waved, very variable in length and 



