ser. melanosperme.e. ( 107 ) fam. chordariej:. 



Plate CLXVIL 

 CHORDARIA FLAGELLIFORMIS.— ^(7. 



Gen. Char. — Frond cellular, solid, filiform, cylindrical, consisting of two sfcraU of cells; 

 the inner oblong, arranged in longitudinal filamentous series, the outer in vertical, 

 short, club-shaped filaments. Fructification : obovate spores, attached, near the 

 base, to the filaments of the periphery. Name from chorda, "a chord." 



Chordaria flagellijormis. — Fronds furnished throughout with nume- 

 rous scattered, mostly simple, filiform branches ; filaments of the 

 peripheiy clavate. 



Chordaria flageUiformis. — Ag. Syn. p. 12 ; Lyngl. Hyd. Dan. p. 51, t. 13 ; 

 Ag. Sp. Alg. vol. i. p. 166 ; Ag. Syst. p. 256; Hook. Fl. Scot, part 2, 

 p. 98 ; Grev. Fl. Edin. p. 2b8 ; Grev. Alg. Brit. p. 44, t. 7 ; Hook. 

 Fl. Brit. vol. ii. p. 275; Wyatt, Alg. Danm. No. 57; iLiilz. Phyc. 

 Gen. p. 332, t. 27, f. 3 ; Endl. 3rd Suppl. p. 23 ; Harv. in Mack. Fl. 

 Hib. part 3, p. 183; Harv. P. B. plate 111; Harv. Man. p. 46; 

 Harv, Syn. p. 39 ; Atlas, plate 12, fig. 47 ; Harv. N. B. A, part 1, 

 p. 123 ; J. G. Agardh, Sp. Gen. Alg. vol. i. p. 66. 



GiGARTiTSA JlageUiformis. — Lamour. Ess. p. 48. 



Yucvs flageUiformis.— Fl. Dan. t. 650; Turn. Syn. vol. ii. p. 335; Turn. Hist. 

 t. 85 ; E. Bot. t. 1222. 



Hab. — On rocks, stones, old shells, &c., in the sea, between tide-marks. Annual. 

 Summer. Everywhere common. 



Geogr. Dist. — Atlantic shores of Europe from Iceland to France, abundant ; Eastern 

 coast of North America ; Cape of Good Hope. 



Description. — Root, a minute spreading disc. Frond filiform, 

 cylindrical, very slightly attenuated at the base and apex, furnished 

 throughout, excej)t a small portion at each end, with long, slender, mostly 

 simple branches, all filiform, cylindrical, the lower ones longest, with 

 occasionally one or two short ramuli ; all erecto-patent. The main stem 

 is generally simple, but occasionally once or twice divided, and is 

 generally percun-ent, but sometimes greatly overtopped by the lateral 

 branches, and is frequently beset at the base with short spine-like 

 branchlets, apparently the remains of such as have been broken ofi', 

 as they are not always present. Stnicture : the axis composed of 

 densely packed, longitudinal, articulated filaments, much interlaced, and 

 frequently anastomosing, the joints oblong, twice or thrice as long 

 as broad. The peripheiy of closely packed, vertical, clavate, articu- 



