The English flora - SeaweedAfrica

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356 ALGJE CONFERVOIDEiE. [Conferva.
branched erect densely tufted somewhat rigid short green,
branches subsecund, articulations incrassated upwards about five
times as long as broad." Dillw. Conf. Syn. t. D. Ag. Syst.
Alg. p. 105.
" On wet rocks, in a cave near Dunrea, Ireland, R. Brown, Esq**
Dillw.
31. C. nigricans, Roth, (blackish Conferva); " filaments dichotomous
somewhat rigid blackish-green, branches long remote
patent, articulations four times as long as broad." Dillw. Conf.
Syn. t. E.— C. aspera, Ag. Syst. Alg. p. 1 15?
In a pond at Wimbledon, Surrey, Mr. Dickson.—A very obscure plant,
of which I know nothing.
32. C. crispdta, Roth, (branching cross-jointed Conferva)
" green branched crisped and entangled, branches alternate
copious acute, joints even several times longer than broad
alternately contracted when dry." Sm. E. Bot. t. 2350. Dillw.
Conf. t. 93. Ag. Syst. Alg. p. 109.
"Collected in pools in Sussex, by Mr. Borrer." Sm.— I am not able
to distinguish this from C.fracta, the chief differences appearing to lie
in the length of the joints ; but this surely is most variable.
33. C. flavescens, Roth, (yellowish branched Conferva); forming
pale-yellowish strata, filaments slender sparingly branched,
branches alternate or subdichotomous erecto-patent with scattered
elongated alternate or secund ramuli, articulations 8—
times longer than broad. Dillw. Conf Syn. t. E.—Ag. Syst. Alg.
/?. 112. E. Bot. t. 2088.— C. pinnatxda , Fl. Dan. t. 945, (sec.
Both.) Dillw. Conf t. 95.
In ditches of salt or fresh-water, not uncommon ; forming vast strata,
which finally rise to the surface.— Allied to C.fracta; but the filaments
are more slender, with longer joints and of a pale yellow colour. It
does not in the least adhere to paper.
34. C. frdcta, Fl. Dan. (broken divaricated Conferva) ; forming
entangled dull-green strata, filaments somewhat rigid much
branched, branches divaricating, ramuli scattered and very
patent, articulations 4—6 times longer than broad. Dillw.
Conf t. 14. E. Bot. t. 2338. Lyngb. Hydroph. Dan. t. 52. Ag.
Syst. Alg. p. 109 C. vagabunda, Linn.—Huds. (3.flexuosa.
—C.flexuosa, Dillw. Conf t. 10. E. Bot. 1944.
In ditches, &c, common.—,3. in salt-water ditches, near Yarmouth,
D. Turner, Esq.—Forming vast strata, finally rising to the surface.
Filaments much and very irregularly branched, all the branches very
patent. j3. differs in being less branched, remarkably flexuose, the
ramuli elongated and secund, and the joints somewhat shorter ; but
there are intermediate appearances, and Dillwyn himself confesses that
it is not always easy to distinguish between the two.
35. C. glomerdta, Linn, (green clustered Conferva); root scutate,
filaments tufted bushy subrigid bright-green, branches
crowded irregular erect, ultimate ramuli secund subfasciculate,
articulations 4—8 times longer than broad.
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9;
Dillw. Conf t. 13.