Sci 1 . Melaxosperme.*. Fam. Sphacelariea. 



Plate XXXVII. 

 SPHACELARIA SCOPARIA, Lyngb. 



Gen. Char. Filaments jointed,, rigid, distichously branched, pinnated ; 

 rarely simple or subdichotomous. Apices of the branches distended, 

 membranous, containing a dark granular mass. Fructification ; ellip- 

 tical utricles, furnished with a limbus, borne on the ramuli. Spha- 

 celaria [Lyngb.) — from acfrdKeXos, gangrene, alluding to the withered 

 tips of the branches. 



Sphacelaria scojparia ; olive or dark brown, coarse, the lower part shaggy 

 with woolly fibres ; upper branches once or twice pinnated ; the pinnae 

 erecto-patent, awl-shaped, alternate, the lower ones pinnulate. 



Sphacelaria scoparia, Lyngb. Hyd. Ban. p. 104. t. 31. B. Ag. Syst. 

 p. 167. Ag. Syst. Alg. vol. ii. p. 19. Grev. Fl. Edin. p. 313. Harv. in 

 Hook. Br. Fl. vol. ii. p. 323. Harv. in Mack. FL Hib. part 3. p. 180. Harv. 

 Man. p. 37. Wyatt. Alg. Damn. no. 361. Ag. Alg. Medit. p. 29. Midi. 

 3rd Suppl. p. 23. Meneg. Alg. Ital. et Balm. p. 344. 



Sphacelaria disticha, Lyngb. I.e. p. 104. t. 31. A. Ag. Sp. Alg. vol. ii. 

 p. 26. Harv. in Hook. Br. Fl. vol. ii. p. 323. 



Sphacelaria scoparioides, Lyngb. 1. c. p. 107. t. 32. C. Ag. Syst. p. 165. 



Ceramtum scoparium, Roth. Cat.Bot. vol.iii. p. 141. Ag. Syn. Hook. Fl. 

 Scot. part. 2. p. 86. 



Conferva scoparia, Linn. Syst. Nat. vol. ii. p. 720. Huds. Fl. Angl. p. 595. 

 Liglrff. Fl. Scot. p. 981. With. vol. iv. p. 131. Billw. Conf. t. 52. E. Bot. 

 t. 1552. 



Conferva marina pennata, Billen. t. 4. f. 23. 



Stypopodium scoparium, Kiltz.Phyc. Gen. p. 293. 1. 18. f. 2. 



Hab. On submerged rocks, within and beyond the influence of the tide. 

 Generally distributed along the coasts of the British Islands ; most 

 common in the south. 



Geogr. Distr. Atlantic coasts of Europe from Norway to Spain. Baltic and 

 Mediterranean Seas. Canary Islands, WM. Cape of Good Hope, If. J I . II. 



Descr. Root, and lower part of the stems invested with a thick coating of woolly 

 fibres. Stems 2-4 inches high or more, shaggy, robust, cither much and 

 irregularly divided, or subsimple, densely set with quadrifarious, pinnate or 

 bi-pinnate branches, which spread from the summits of the main divisions 

 in broad, brush-like, rigid tufts. Pinna cither short, simple, and >]>iuc- 

 1 ike or elongated, and again pinnulate. Joints Longitudinal].] Btriate. A 

 section of the stem and its accessory fibres (fig. •">), exhibits an elegant lace- 

 work of square cellules in the centre of the stem, and of each separate fibre. 



So different from each other arc the summer and winter Btates 



