Ser. RuoposPpERMB#. Fam. Chondrica. 
Puate CLII. 
LAURENCIA DASYPHYLLA, Grev. 
Gen. Cuan. Frond cylindrical or compressed, linear, pinnately branched, 
the apices obtuse; structure cellular, solid. Fructification of two 
kinds on distinct individuals; 1, ovate capsules (ceramidia) furnished 
with a terminal pore, containing a tuft of pear-shaped spores; 2, tri- 
parted ¢e¢raspores, imbedded in the ramuli. Laurencra (Lamour.),— 
in honour of M/. de la Laurencie, a French naturalist. 
Lavrencta dasyphyll/a; frond cylindrical, filiform, decompound-pinnate or 
irregularly branched; branches erecto-patent; ramuli short, club- 
shaped, obtuse, transversely striate, very much attenuated at the base. 
Lavrencta dasyphylla, Grev. Aly. Brit. p. 112. t. 14. f. 18-17. Hook. Br. 
Fi. vol. i. p. 296. Harv. in Mack. Fl. Hib. part 3. p. 198. Harv. Man. 
p- 70. Wyatt, Alg. Danm. no. 11. J. Ag. Alg. Medit. p.113. Mont. 
Algier. p.95. Endl. 3rd Suppl. p. 43. Hook. fil. and Harv. in Lond. 
Journ. Bot. vol. vi. p. 401. 
LAvRENCIaA cespitosa, Lamour. Ess. p. 43. fide Ag. 
Cuonpria dasyphylla, 4g. Sp. Aig. vol. i. p. 350. Ag. Syst. p. 205. Spreng. 
Syst. Veg. vol. iv. p. 342. Kiitz. Phyc. Gen. p. 436. t. 55. f. 2. 
GiGaRTINA dasyphylla, Lamour. Ess. p. 48. 
Fucus dasyphyllus, Woodw. in Linn. Trans. vol. ii. p. 239. t. 21. Turn. Syn. 
p- 38. Zurn. Hist. t.22. Sm. E. Bot. t. 847. 
8. squarvosa; tufts intricate; fronds irregularly branched; the branches 
arched, and more or less recurved; ramuli frequently attenuated at 
the apex. 
Has. On stones and shells in pools, near low-water mark, generally where 
the surface is covered with sand or mud. 8. dredged in 4—5 fathoms 
water. Annual. Summer. Frequent, on the shores of Great Britain, 
Treland, and the Channel Islands. 8. in Plymouth Sound, Rev. W. 
S. Hore. 
Grocer. Distr. Atlantic shores of Europe and America. Mediterranean and 
Baltic Sea. West Indies, Agardh. Tasmania, Mr. Gunn. Cape of Good 
Hope, Herb. Mertens. 
Descr. Root accompanied by creeping fibres. Fronds several from the same 
base, from four to twelve inches long, or more, half a line in diameter, 
eylindrical, generally with an undivided, or once forked principal stem, 
closely set with lateral branches, the lowermost of which are longest, the 
rest gradually lessening upwards, so that the outline is pyramidal. Branches 
either alternate, or opposite, or two or three consecutively from the same 
side of the stem, more or less quadrifarious, erecto-patent, bearing a second 
or third series of similar, but smaller branches; the last of which are fur- 
nished with short patent, club-shaped, obtuse ramuli, from one to four lines 
in length, and very much attenuated at their insertion. Sometimes the 
branching is very dense and bushy, at other times the main branches are 
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