CHRYSYMENIA. 



flaccid, soon decomposing. Colour a fine but .fugitive pink, becoming 

 yellowish and whitish in decay. Ceramidia ovate, on the smaller branches ; 

 granules ternate, immersed in the ramuli. 



4. L. dasyphylla, Woodw. ; frond filiform, terete, irregu- 

 larly branched ; ramuli short, club-shaped, obtuse, very much 

 attenuate at base. Grev. Alg. Brit. p. 112; Hook. Br. FL 

 ii. p. 296; Wyatt, Alg. Danm. No. 71; Harv. Phyc. Brit. t. 

 clii. Fucus dasyphyllus, E. Bot. t. 847. 



On rocks or stones between tide-marks. Annual. Summer. Frequent on 

 the shores of England and Ireland. Root fibrous. Fronds 4 12 inches 

 high, cylindrical, half a line in diameter ; stem generally undivided, set with 

 more or less frequent opposite or alternate branches, the lower ones being 

 longest, and frequently bearing a second series ; all having numerous, linear 

 club-shaped, obtuse ramuli, 1 or 2 lines in length, and very much attenuate 

 at base, resembling the leaves of a Sedum : the whole frond marked, at short 

 distances, with more or less distinct transverse striae. Substance somewhat 

 gelatinous, quickly decomposing. Colour a pale fugitive pink, or yellowish. 

 Ceramidia ovate, on the lesser branches : granules ternate in the ramuli. 

 Readily distinguished from the preceding by the ramuli tapering towards 

 the base, and from the following by their being obtuse. 



5. L. tenuissima, Good, and Woodw. ; frond filiform, terete, 

 irregularly branched ; ramuli very slender, tapering to the 

 base and apex. Grev. Alg. Brit. p. 113; Hook. Br. FL ii. 

 p. 296; Wyatt, Alg. Danm. No. 22; Harv. Phyc. Brit. t. 

 cxcviii. Fucus tenuissirnus, E. Bot. t. 1882. 



Between tide-marks, on rocks and other Algae ; very rare. Annual. 

 Summer and autumn. Weymouth, Goodenough and Woodward. Isle of 

 Wight, Rev. G. R. Leathes. Torquay, Mrs. Griffiths. Cornwall, E. Bot. 

 Ballycotton, coast of Cork, Miss Ball. Root fibrous. Fronds tufted, 6 8 

 inches long, half a line in diameter, cylindrical, much branched in an irre- 

 gularly pinnate manner; the main stem generally undivided, having nume- 

 rous, alternate, spreading branches, of unequal length, some of the longest 

 bearing a second series; and all set, at the distance of one or two lines, 

 with slender, bristle-like ramuli, 14 lines long, much attenuated at their 

 insertion, and more or less tapering towards the point. Substance very 

 tender, between gelatinous and cartilaginous. Colour a pale purplish or 

 pinky red, fugitive, and becoming yellowish. Ceramidia ovate, borne by 

 the ramuli, in which also the tetraspores are imbedded. 



III. CHRYSYMENIA. J. Ag. [Plate 13, A.] 



Frond tubular, continuous (not constricted or jointed), 

 filled with a watery juice, and traversed by a few longitudinal 

 filaments; its. walls composed of several rows of cells, the 

 innermost of which are distended and much elongated, the 

 outer gradually smaller, and the superficial ones very minute. 

 Fructification : 1, ceramidia, containing a very dense tuft of 



H 2 



