Ser. MelanospermEjE. Fam. Laminariea. 



Plate LXXIX. 



ALARIA ESCULENTA, Grev. 



Gen. Char. Root fibrous. Frond stipitate, membranaceous, furnished with 

 a percurrent, cartilaginous midrib ; the stipes pinnated with ribless 

 leaflets. Fructification, an oblong sorus, formed of pyriform, vertical 

 tetraspores, and situate in the accessory leaflets. Alaria [Grev.), — 

 from ala, a wing ; in allusion to the winged frond. 





Alaria esculenta ; frond elongated, lanceolate, entire ; rib narrow, cylin- 

 drical; leaflets linear-oblong or cuneate. 

 Alaria esculenta, Grev. Alg. Brit. p. 25. t. 4. Hook. Brit. Fl. vol. ii. p. 271. 

 Harv. in Mack. Fl. Hib. part 3. p. 171. Wyatt, Alg. Banm. no. 203. 

 Harv. Man. p. 23. Post, and Rupp. p. 11. t. 17. Endl. 3rd Suppl. p. 28. 

 Kiitz. Phyc. Gen. p. 347. t. 32. f. 1. 



Laminaria esculenta, Lyngb. Hyd. Ban. p. 23. Ag. Sp. Alg. vol. i. p. 110. 

 Syst. p. 269. Hook. Fl. Scot, part 2. p. 98. Grev. Fl. Edin. p. 282. 

 La Pylaie, Ann. Sc. Nat. vol. iv. p. 178. t. 9. f. D-F. Spreng. Syst. Veg. 

 vol. iv. p. 326. 



Agarum esculentum, Bory. Diet. Class. Nat. Hist. vol. ix. p. 194. 



Fucus esculentus, Linn. Mant. p. 135. Fl. Ban. p. 364. Syst. Nat. vol. ii. 

 p. 718. Gmel. Syst. Nat. vol. ii. p. 1389. Fl. Ban. t. 417. Light/. Fl. 

 Scot. vol. ii. p. 938. t. 28. Llnds. Fl. Ang. p. 578. With. vol. iv. p. 93. 

 Turn. Syn. Fuc. vol. i. p. 104. Turn. Hist. t. 117. Fug. Bot. t. 1759. 

 Esper. Ic. Fuc. vol. ii. p. 30. 1. 126. 



Fucus fimbriatus, Gm. Hist. Fuc. p. 200. t. 29. f. 1. 



Fucu3 tetragonus, Good, and Woodw. in Linn. Trans, vol. iii. p. 140. 



Fucus teres, Good, and Woodw. in Linn. Trans, vol. iii. p. 140. 



Fucus pinnatus, Fl. Norv. vol. i. p. 96. 



Fucus scoticus latissimus edulis dulcis, Raii. Syn. p. 46. n. 30. 



Hab. Fringing precipitous rocks, at low-water mark. Perennial. Winter 

 and spring. Abundant on the shores of Scotland, and of the north 

 and west of Ireland. Cumberland, Hudson. Anglesea and Isle of 

 Man, Rev. II. Davies. Durham and Northumberland, Winch. Corn- 

 wall, Turner. North coast of Devonshire, Mrs, Griffiths. Weymouth, 

 Stackhouse. Orkney, Rev. Mr. Clouston. 



Geogr. Distr. Abundant in the Arctic Ocean and Northern Atlantic. Iceland, 

 Lyngbye. Northern Pacific. Sitka. Kamtschatka. Atlantic shores of 

 France, Lenormand. 



Descr. Root consisting of several radiating, cylindrical, branching and grasping 

 fibres. Stem as thick as a small goose-quill, naked in its lower part for the 

 length of 2-4 inches; then pinnated with leaflets for 1-3 inches more, and 

 finally terminating in the midrib of the frond. Leaflets numerous, 2-1 inches 

 in length, and from a quarter to half an inch in breadth, rib-less, filiform al 

 the hase, gradually widening upwards, generally obtuse. Frond, when fully 

 grown, from 3-20 feet in length, and from 2-8 inches in breadth, mem- 

 branaceous, entire, splitting obliquely towards the midrib, linear or Lanceo- 

 late, tapering to eacb extremity, the surface perforated with minute pores, 

 producing tufts of fibres. Fructification forming an oblong, reddish brown, 



X 



