See. MELANOSPERMEiE. (29) Fam. FUCACE.E. 



Plate CXLI. 

 HIMANTHALIA 'LO'RBA.—Li/ngb. 



Gen. Char. — Frond at first obconical, at length top-sliaped, expanding at the summit 

 and cup-shaped, emitting from the centre one or more receptacles, which are 

 elongate, compressed, dichotomous, with spherical conceptacles under the peri- 

 phery, containing attached to their inner surface jointed filaments, which either 

 produce antheridia or roundish cruciate spores on distinct plants. Himanthalia 

 (Lyngb.) from IfMas, "a strap," and OaAos, " a branch" (or aAs, "the sea"). 



Himanthalia lorea. — Lyngh. Hyd. Dan. p. 36, t. 8 ; Grev. Fl. Edin. p. 285 ; 

 Gaill. in Diet. Sc. Nat. vol. liii. p. 357 ; Grev. Alg. Brit. p. 20, t. 3 ; 

 Hoolc. Br. Fl. vol. ii. p. 269 ; Wyatt, Alg. Danm. No. 3 ; Kutz. Phyc. 

 Gen. p. 351; Endl. 3rd Suppl. p. 29; Harv. in Mack. Fl. Bib. part 3, 

 p. 170; Harv. P. B. plate 78; Harv. Man. p. 20; Earv. Syn. p. 20; 

 Atlas, plate 4, fig. 16 ; Earv. N. B. A. part 1, p. 72; /. G. Agardh, 

 Sp. Gen. Alg. vol. i. p. 196. 



FuctJS loreics.^Linn. Syst. Nat. vol. ii. p. 716; Gmel. vol. ii. p. 1382; Euds. Fl. 



Angl. p. 583 ; Lightf. Fl. Scot. p. 920 ; Fl. Dan. t. 710 ; With. Br. 



PI. vol. iv, p. 96 ; Stack. Ner. Brit. p. 37, t. 10 ; E. Bot. t. 669 ; 



Turn. Syn. Fuc. vol. ii. p. 246 ; Eist. t. 196 ; Laniour. Ess. p. 19 ; 



Ag. Sp. Alg. vol. i. p. 98 ; Ag. Syst. p. 280; Spreng. Syst. Veg. vol. iv. 



p. 316. 

 Fucus elongatus. — Linn. Sp. PI. vol. ii. p. 1627 (excl. syn. Mwis) ; Syst. vol. ii. 



p. 716 ; Gmel. vol. ii. p. 1381 ; Gmel. Eist. Fuc. p. 103 (excl. syn. 



Euds.). 



Frcus longo angustocrassoque folio. — Faii Syn. p. 43, n. 11. 



F0CUS fvMgis affinis. — Raii, 1. c. p. 43, n. 15. > 



Hab. — On rocks and stones near low -water mark. Biennial. Spring and winter. 

 Common. 



Geogr. Dist. — Atlantic shores of Europe ; eastern coast of North America. 



Description. — Root, a minute disc. Fronds densely aggregated when 

 young, cylindrical or polygonal from mutual pressure, at length obconi- 

 cal, then expanding at the summit, and cup-shaped ; the margin at 

 length often recurved, one to two inches in length, and one to one and 

 a-half in breadth. Receptacles, arising from the inside of the cup, two 

 to four feet or more in length, about half an inch in breadth, repeatedly 

 dichotomous, linear, compressed, but not two-edged ; their apices more 

 or less tapering to an obtuse point, containing, immersed throughout 

 its whole length, spherical conceptacles, communicating with the surface 

 by a minute pore, and having attached to their inner surface innumer- 

 able jointed filaments, which either produce roundish cruciate spores, or 



