Ser. Melanosperme^e. Fam. Fucoidece. 



Plate CCIV. 



FUCUS VESICULOSUS, Linn. 



Gen. Char. Frond linear, either flat, compressed or cylindrical, dichoto- 

 mous (rarely pinnated), coriaceous. Air-vessels when present, innate, 

 simple. Receptacles either terminal or lateral, filled with mucus 

 traversed by a net-work of jointed fibres, pierced by numerous pores 

 which communicate with immersed, spherical conceptacles, containing 

 parietal spores or antheridia, or both. Fucus (L.), — (\>v<os, a sea- 

 weed. 



Fucus vesiculosus ; frond flat, coriaceous, thick, linear, dichotomous, quite 

 entire at the margin, mid-ribbed; air-vessels globose or elliptical, 

 mostly in pairs (often absent) ; receptacles turgid, elliptical, ovate, or 

 lanceolate, terminal. 



Fucus vesiculosus, Linn. Sp. PI. p. 1626. Linn. Fl. Lap. p. 366. Ends. 

 Fl. Aug. p. 576. Lightf. Fl. Scot. p. 904. Stack. Ner. Brit. p. 3. t. 2. and 

 p. 12. t. 6. Esper. Ic. p. 35. 1. 12. 13. and p. 160. t. 83. 84. Felley, t. 

 1. With. Bot. vol. iv. p. 84. Gunn. Fl. Norv. vol. i. p. 48. Roth, Fl. 

 Germ. vol. hi. p. 442. Turn. Syn. p. 117. Turn. Hist. t. 88. Lamour. 

 Ess. p. 18. E. Bot. t. 1066. Lyngb. Hyd. Ban. p. 3. t. 1. Ag. Sp. Alg. 

 vol. i. p. 87. Ag. Syst. p. 275. Grev. Crypt. Fl. t. 319. Grev. Alg. Brit. 

 p. 12. t. 2. Book. Br. Fl. vol. ii. p. 267. Wyatt, Alg. Damn. no. 152. 

 Harv. in Mack. Fl. Hib. part 3. p. 168. Harv. Man. p. 20. Kiitz. PJtyc. 

 Gen. p. 351. t. 33, 34, 35, 36. Endl. 3rd. Suppl. p. 29. Mont. Fl. Canar. 

 Cell. p. 139. Mont. Fl. Algier. p. 21. Harv. in Bot. Beechey, p. 163 and 406. 



Fucus divaricatus, Linn. Sp. PI. p. 1627. Lightf. Fl. Scot. p. 909. Esp. 

 Ic. t. 11. 



Fucus inflatus, Linn. Sp. PI. p. 1627. Lightf. Fl. Scot. p. 910. 



Fucus spiralis, Linn. Sp. PI. p. 1627. Stack. Ner. Brit. t. 5. E. Bot. 

 1. 1685. Fl. Dan. t. 286. Huds. Fl. Ang. p. 577. Lightf Fl. Scot. p. 911. 



Fucus volubilis, Huds. Fl. Ang. p. 577. 



Fucus Sherardi, Slack. Ner. Brit. p. 72. t. 13. /. Ag. Alg. Medit. p. 46. 



Fucus linearis, Huds. Fl. Ang. p. 578. 



Fucus distichus, Lightf. Fl. Scot. p. 912. (not of Linn.) 



/3. subecostatus ; very small, densely tufted, with an indistinct mid -rib, and 

 destitute of vesicles. 

 Fucus balticus, Ag. Sv. Bot. t, 516. Grev. Crypt. Fl. t. 181. 



Hab. Qu rocks and stones left exposed at low water; also on artificial 

 piers and quays in actuaries, extending up rivers as long as the water 

 remains sensibly brackish. Perennial. Summer and winter. Very 

 abundant on the British coasts. jS. in salt marshes, occasionally 

 flooded. Near Dunstafthich Castle and Isle of Kerera, Mr. Maugkan. 

 Appin, Copt. Carmichael. Arran, Sir W. J. Hooker. Bute, /Jr. 

 Greville. Baldoyle and Iloundstone Bay, (bearing fructifications). 

 Mr. M } Calla. 



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