Ser. MELANOSPERME.E. ( 9 ) Fam. FUOACE.E. 



Plate CXXXIII. 

 CYSTOSEIRA F.ENICULACEA.— ^^. 



Gen. Char. — Frond very coriaceous, occasionally leafy at the Lase, slender and filiform 

 upwards ; air-vessels formed by inflation of tlie frond ; receptacles terminal, very 

 small, containing numerous spherical conceptacles, communicating -with the surface 

 by a minute pore, containing obovate spores attached to the inner surface, and 

 mixed with antheridia. Name from Kvaris, "a box or bladder," and ircipa, "a 

 chain," because the air-vessels are continuous through the branches. 



Cystoseira fieniculacea. — " Stem compressed ; branches long, slender, 

 rough with hard points, repeatedly dichotomo-pinnate ; air-vessels small, 

 solitary or two together, elliptical-oblong, placed near the tips of the 

 branches ; receptacles minute, smooth, linear-lanceolate." 



Cystoseira fceniculacea. — Grcv. Alg. Brit. p. 6 ; Hoolc. Br. Fl. vol. ii. p. 265 ; 

 Wyatt, Alg. Damn. No. 51 ; Harv. P. B. plate 122 ; Harv. Man. 

 p. 17 ; Harv. Syn. p. 15 ; Atlas, plate 2, fig. 7. 



Cystoseira discors. — Ag. Sp. Alg. vol. i. p. 62 ; Ag. Syst. p. 284 ; Spreng. Sysf. 

 Veg. voL iv. p. 317 ; /. Ag. Alg. Medit. p. 51 ; Endl. 3rd Suppl, 

 p. 30 ; Menegh. Alg. Ital. et Dalm. vol. i. p. 83 ; 3font. Fl. Alger. 

 p. 17 ; Kiltz. Phyc. Gen. p. 358; /. G. Agardli, Sp. Gen. Alg. vol. i. 

 p. 224. 



Cystoseira abrotanifolia. — Ag. Sp. Alg. vol. i. p. 63; Ag. Syst. p. 284; Spreng. 

 Syst. Veg. vol. iv. p. 317 ; /. Ag. Alg. Medit. p. 52; Bndl. 3rd Suppl. 

 p. 30; Menegh. Alg. Ital. et Balm. vol. i. p. 92; Mont. Fl. Alger. 

 p. 19 ; Kiitz. Phyc. Gen. p. 357. 



Fucus fceniculaceus. — Linn. Sp. PI. p. 1629 ; Turn. Hist. p. 252. 



Fucus discors. — Linn. Syst. Nat. p. 717 ; Turn. Syn. p. 70 ; Esper, Ic. t. 26 ; 

 Stack. Ner. Brit. t. 17 ; E. Bot. t. 2131 ; Lamour. Ess. p. 17. 



Fuous ahrotanifolius. — Linn. Sp. PI. p. 1629 ; Huds. Fl. Angl. p. 575 ; StacTc. 

 Ner. Brit. p. 86, t. 14 ; Turn. Syn. p. 66 ; E. Bot. t. 2130 ; Lamour. 

 Ess. p. 18. 



Hab. — On rocks and stones in tide-pools near low-water. Perennial. Summer. Not 

 uncommon on the southern shores of England. Isle of Wight ; Jersey. 



Geogr. Dist. — Atlantic shores of England, from the south of England to Spain; 

 Mediterranean Sea. 



Description. — " Eoot, a thick, hard, conical disc." Stem cylindrical 

 at the base, compressed upwards, three to six inches in length, and one 

 to two lines in diameter, rough, especially upwards, with spine-like pro- 

 tuberances, and beset with long slender filiform branches, rough like the 

 stem, and generally naked in the lower part, repeatedly and irregularly 



VOL. III. c 



