L.Heeve.-iin-j.
Ser. Chlorospebmeæ. Pam. Coììferoem.
P l a t e CCXCIV.
CLADOPHORA FRACTA, Kg.
G e n . Ch a e . Mlaments green, attached, uniform, branched, composed of a
single series of cells or articulations. Muit, aggregated granules or
zoospores, contained in the articulations, having, at some period, a
proper ciliary motion. C ladophoea (K ü tz) ;—from ¿Aahos, a branch,
and rjyopem, to bear.
Cladophoea fr a c ta ; tufts irregular, entangled, often detached and then
forming floating strata, dull green; filaments somewhat rigid, distantly
branched, the lesser branches somewhat dichotomous, spreading,
with very wide axils, the ramuh few, alternate or commonly secund ;
articulations from three to six times as long as broad, at first cylindrical,
then elhptioal, with contracted dissepiments.
C l a d o p h o e a fracta, Kütz. Phyc. Gen. p. 263. Kütz. Sp. Alg. p. 410. Harv.
i l i « , ed. 3. p. 306.
C o n f e r v a fracta, M. Ban. t. 946. Billw. Conf. t. 14. E. Bot. t. 3338.
Wib. et Mohr, Gr. Conf. 1 .14. Roth, Cat. Bot. vol. iii. p. 330. Ag. Bisp.
p. 31. Ag. Syst. p. 109. Lyngh. Hyd. Ban. p. 153. t. 52. Harv. in Hook.
Br. El. vol. ii. p. 356. Harv. Man. ed. 1. p. 134. Harv. in Mack. El. Hib.
p a rt S. p. 327.
Conferva divaricata, Roth, Cat. Bot. vol. i. p. 179.
Conferva vagabunda, Huds. El. Angl. vol. ii. p. 601. Lightf. El. Scot. vol. ii.
p. 990. Billen. Hist. Muse. t. 5. f. 33.
Conferva Iurta, El. Ban. t. 947.
C o n f e r v a flavescens, Wyatt, Alg. Banm. no. 334. {not o f Roth)
H a b . In ditches of brackish water, communicating with the tide ; also in
fresh-water lakes, ditches, and streams. Common.
G e o g r . D i s t e . Abundant throughout Europe.
D e s c r . At first forming loose tufts, which frequently become detached, and the
plant is more commonly found constituting floating strata, many tufts entangled
together in each floating mass. Eilaments capillary, from six to
eight or ten inches long, much, but very irregularly branched, the branches
distant, spreading at wide angles, or mucli divaricated, either dichotomous
or alternate ; the lesser branches repeatedly forked, with wide axils, and
the ramuli, which are few and very patent, commonly secund, sometimes
alternate. Articulations three or four times as long as broad, rarely six.
times as long, those of the upper branches pretty uniformly thrice as long
as their diameter, at first cylindrical, then becoming pyriform, and when
mature elliptical, when the branches resemble strings of dark-green beads,
Bissepiments finally much contracted. Colour at first a pleasant grass-
green, becoming darker and duller as the plant advances in age. The eni]
i
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