Sek. G0NGYL0SPER5IE.E. Fam. RHODYMENlACEiE. 



Plate LXVII. ^ 



AVORMSKIOLDIA SANGUINEA.— %-m^ 



Gen. Char. — Frond membranaceous, flat, with percurrent midrib and lateral veins. 

 Fructification of two kiads, on distinct plants : 1. Coccidia, spherical, and 

 shortly stalked, produced on defoliated midribs of old plants ; 2. Tetraspores, 

 imbedded in small leaf-like processes, similarly produced. 



WoRMSKiOLDiA sanguinca. — Stem short, cylindrical, branched, beset 

 with large, oblong or obovate leaf-like fronds with entire waved margins, 

 and a strong percurrent midrib, closely pectinated on each side by 

 opposite lateral veins ; tubercles produced on the midribs of old bat- 

 tered fronds ; tetraspores immersed in small leaf-like expansions, also 

 on old midribs. 



Worms KioLDiA sanguinea. — Spreng. Syst. Yeg. vol. iv. p. 331 ; J. G. Agardh, Sp. 

 Gen. Alg. vol. ii. p. 408. 



Delesseria sanguinea. — Lamour. Ess. p. 124 ; Lyngh. Eyd. Dan. p. 7, t. 2 ; 

 Ag. Sp. Alg. vol. i. p. 172 ; Ag. Syst. p. 248 ; Hook. Fl. Scot, part 2, 

 p. 100 ; Grev. Fh Edin. p. 292 ; Grev. Alg. Brit. p. 72 ; Hook. Br. 

 Fl. vol. ii. p. 285 ; Wyatt, Alg. Banm. No. 13 ; Endl. 3rd Suppl. 

 p. 53 ; Eiitz. Phyc. Gen. p. 445, t. 67 ; Harv. in 3IacK Fl. Hih. 

 part 3, p. 191 ; Harv. P. B. plate 151 ; Harv. Man. p. 114 ; Harv. 

 Syn. p. 95 ; Atlas, plate 37, fig. 169. 



Fucus sanguineus. — Linn. Syst. Nat. vol. ii. p. 718 ; Lightf. Fl. Scot. vol. ii. 

 p. 942 ; Huds. Fl. Angl. p. 573 ; Stach Ner. Brit. t. 7 ; Turn. Syn. 

 vol. i. p. 7 ; Turn. Hist. t. 36 ; E. Bot. t. 1041. 



Hab. — In shady rock -pools, between tide-marks. Biennial. Fruit in winter. 

 Common all round the British coasts. 



Geogr. Dist. — Atlantic shores of Europe ; Baltic Sea. 



Description. — Root a hard conical disc, with a broad flattened base. 

 Frond with a short, cylindi-ical, biennial, once or twice divided stem, 

 from which arise on all sides sessile or slightly stalked, at first lanceolate, 

 afterwards oblong, obovate or I'oundish, obtuse or acute, entire fronds 

 generally more or less waved at the margin, often much so when old, 

 with a strong percmrent midi'ib, pectinated on each side with close-set 

 opposite veins, simple, and running somewhat obliquely to the mai'gin. In 

 young fronds the outline is more or less lanceolate, tapering to the base, 

 and more shortly to the summit, which is rounder but often more or less 

 acute at the apes ; gTadually they become more oblong, and ultimately 



VOL. ir. B 



