Ser. RHoposPERME®. Fam. Rhodomelea. 
Piatt CCXX. 
RYTIPHLZA FRUTICULOSA, Zarv. 
Gen. Cuar. Frond filiform or compressed, pinnate, transversely striate, 
reticulated ; the axis articulated, composed of a circle of large, 
tubular, elongated cells (szphons), surrounding a central cell; the 
periphery of several rows of minute, irregular, coloured cellules. 
Fructification of two kinds, on distinct individuals ; 1, ovate capsules 
(ceramidia), containing a tuft of pear-shaped spores; 2, ¢etraspores, 
contained in minute lanceolate receptacles (stichidia), ina double row. 
Rytreuima (Ag.),—from puts, a wrinkle, and dows, the bark; 
because the surface is transversely wrinkled or striate. 
Rytreuima fruticu/osa ; stems diffuse, branched from the base ; branches 
divaricating pmmnato-dichotomous, set im the lower part with short, 
horizontal, multifid ramuli; in the upper more or less pinnated with 
larger, similarly divided branchlets ; axils rounded ; ceramidia ovate, 
sessile, densely set ; tetraspores in distorted ramuli. 
PotysrpHonta fruticulosa, Spreng. Syst. Veg. vol.iv. p. 350. Duby, Bot. 
Gall, p.966. Harv. in Mack. Fl. Hib. part 3. p. 205. Harv. in Hook. 
Br. Fl. vol. ii. p. 327 (iv part). Harv. Man. p. 86. Wyatt, Alg. Danm. 
no. 132. Mont. Crypt. Aig. n.19. Fl. Alg. p.81. Mont. Crypt. Canar. 
p- 170. Endl. 3rd Suppl. p. 46. 
PotysrpHonta Wulfeni, 4y. dig. Medit.p. 144. Kiitz. Phyc. Gen. p. 431. 
Hurcurnsta fruticulosa, 4g. Syst. p. 27. 
Hurcutnsia Wulfeni, dy. Sp. Alg. vol. ii. p. 95. 
Gramuita Wulfeni, Bonn. Hyd. p. 27. 
Crramium Wulfeni, Roth, Cat. Bot. vol. ii. p. 140. 
Fucus fruticulosus, Wulf. in Jacg. Col. p. 159. t.16. Crypt. Ag. p. 56. 
Esper, Ic. Fuc. p.165.t.87. Clem. Ess. p. 319. #. Bot. t. 1686. Turn. 
Syn. Fue. vol. i. p. 394. Turn. Hist. t. 227. 
Has. In pools left by the tide, growing on the rocky bottom, or on Coral- 
lines and other small Algze. Perennial. Summer. Common on the 
western and southern shores of the British Islands. 
Groep. Distr. Atlantic and Mediterranean shores of Europe. Northern coasts 
of Africa. Canary Islands. 
Descr. Root a mass of creeping, entangled fibres. Fronds forming large, glo- 
bose tufts, often six inches in diameter, composed of a great number of 
separate stems intertwined together. Stems 4—6 inches long, twice as thick 
as hog’s bristle, gradually attenuated upwards, branched from the base and 
bushy. Main dranches somewhat dichotomous, spreading at wide angles ; 
the upper and small divisions repeatedly pinnate, or irregularly branched. 
The lower branches are furnished with alternate, multifid ramuli, a line or 
two in length and very patent; the upper more regularly pinnate with 
longer branchlets, which are set with simple or multifid subulate ramuli. 
Every part of the frond is marked by dark-coloured transverse strize, set at 
2 BQ 
