Ser. CHLOROSPERMER. Fam. Confervee. 
Prats CCXCVIII. 
CLADOPHORA FLAVESCENS, 4j. 
Gun. Cuan. Filaments green, attached, uniform, branched, composed of 
a single series of cells or articulations. /ruit, aggregated granules 
or zoospores, contained in the articulations, having, at some period, 
a proper ciliary motion. CLapopHora (K7itz.),—from kAados, a branch, 
and dopew, to bear. 
Crapornora flavescens; forming pale yellowish strata; filaments slender, 
sparingly branched; branches alternate or subdichotomous, erecto- 
patent, with scattered, elongate, alternate or secund ramuli; articula- 
tions from eight to nine times as long as broad. 
CLADopPHORA flavescens, Ky. Phyc. Gen. p. 267. Harv. Man. ed. 2. p. 206. 
Ky. Sp. Alg. p. 402. 
Conrerva flavescens, Roth. Cat. Bot. vol. ii. p. 224, vol. ili. p. 241. FI. 
Germ. vol. ili. pars 1. p.511.  Dillw. Conf. p. 64. t. E.  H. Bot. t. 2088. 
4g. Syst. p. 112? 
Has. In ditches or pools of brackish or fresh water. Annual. Summer. 
Geogr. Distr. Europe. 
Descr. This species grows in continuous tufts, which, as they rise to the sur- 
face, form extensive floating strata covering the pool. Filaments slender, 
capillary, tangled together, irregularly branched; the main thread some- 
what dichotomous, with widely-spreading axils, and often bent in an an- 
gular manner first to one side, then to the other: the lateral branches 
alternately divided, patent, with a few distant, scattered, alternate or secund 
ramuli. Articulations cylindrical, many times longer than broad, filled with 
a pale, granular endochrome. Colour when young a yellowish green, be- 
coming yellower in age, and at last almost golden. When dry it has a 
silky appearance, and fades in the herbarium to a yellowish white. Sud- 
stance soft, membranous, but not strongly adhering to paper. 
nen 
Rew 
In a recent number we gave a figure of Cladophora fracta, a 
species nearly related to the plant now described, and inhabiting 
similar places. Both species frequently fill the pools in which 
they grow, and, rismmg in the water, cover the surface with a 
thick fleece, under which large bubbles of air, a portion of which 
is oxygen disengaged by the plant under the influence of light, 
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