See. MELANOSPEEME/E. ( 49 ) Fam. LAMINARI^. 



Plate CXLVIIL 

 LAMINAKIA BULBOSA.— iamowr. 



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 hulbosa. — Stem flattened, with a thin waved margin, 

 narrowed upwards ; root, a broad, hollow warted tuber, with few, mostly- 

 simple roots ; frond oblong or ovate, split into narrow lacinise ; fructifi- 

 cation collected in sori, mostly in the waved mai'gin of the stem. 



» 

 Laminaria hulbosa. — Lamour. Ess. p. 22 ; Ag. Syn. p. 18 ; Lyngh. Hyd. Dan. p. 21 ; 

 Hooh. Fl. Scot, part 2, p. 99; Ag. Syst. p. 271; Ag. Sp. Alg. vol. i. 

 p. 114; Grev. Alg. Brit. p. 29; Hooh. Br. Fl. vol. ii. p. 271 ; Wyatt, 

 Alg. Damn. No. 4; Harv. in Mack. Fl. Hib. part 3, p. 171; Harv. 

 P. B. plate 241 ; Harv. Man. p. 30 ; Harv. Syn. p. 26 ; Atlas, 

 plate 7, fig. 26. 



Laminaria Belvisii. — Ag. Sp. Alg. vol. i. p. 115; Ag. Syst. p. 271. 



Saccorhiza hulbosa. — De la Pyl. Fl. Ter. Neuv. p. 23 ; /. 0. Agardh, Sp. Gen. 

 Alg. vol. i. p. 137. 



Haligenia hulbosa. — Dne. Ess. p. 50 ; Endl. 3rd Suppl. p. 27. 



Phycocastanum hulbosum. — Kiitz. Phyc. Gen. p. 346. 



F0CUS hulbosus. — Huds. Fl. Angl. p. 579 ; Linn. Trans, vol. iii. p. 153 ; Turn. 

 Syn. p. 212 ; Esper, Ic. t. 123 ; E. Bot. t. 1760 ; Turn. Hist. t. 161. 



Fucurs polyschides. — Lightf. Fl. Scot. p. 936; With. Br. PI. vol. iv. p. 97 ; Stack. 

 Ner. Brit, t, 4. 



FuctTS palmatus. — Gmel. t. 40. 



Ulva hulbosa.— do. Fl. Fr. vol. ii. p. 16, 



Hab, — On rocks and stones from low- water mark to the depth of twenty fathoms. 

 Perennial. Autumn. Very common. 



Geogr. Dist. — Shores of Europe ; Noi-way to Sjiain ; Faroe Islands ; Coast of Guinea: 

 Pal. de Beauvois. 



Description. — Root, in the young state of the plant, composed of 

 several clasping fibres, gradually perishing as the frond increases in 

 size, and its place supplied by a hollow tuber, which originates at a 

 higher point of the stem. " Stem, at first slender and filiform, half a 

 line in diameter, and an inch in height, with a small dilatation like 

 a collar a little above the middle, gradually becoming broader and quite 



VOL. III. H 



