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Roth himself, (Cat. Bot. vol. iii. p. 267.) and is mine, after
having examined a fragment of the specimen, published by
Jurgens, and referred to by Agardh, for which I am indebted to
the kindness of Mr. Berkeley. On placing together under the
microscope specimens of C. linum from several localities, there
may be observed minor differences between them, but all have
so many characters in common, that I consider it quite inexpedient
to propose more than one species. The C. linum of Jurgens
is exceedingly like our British plant, and the slight difference
may be accounted for by difference of habitat.
A . C o n f e r v a lin um ;— o f the
nifieds
size. 2. Portion of a filament -may-
. P l a t e CL. B.
CONFERVA SUTORIA, Berk.
CoNPEB,YA sntoria-, filaments setaceous, extremely long, flexuous, equal,
dark g re e n ; articulations once and a half as long as b ro a d ; interstices
pellucid.
CoNPEKVA sutoria. Berk. Gl. Alg. t. 14. f. 3. Ilarv. Man. p. 138.
H a b . Moating in ditches and pools, subject to the influence of the tide, at
Wisbeaoh, Rev. M . J . Berkeley. Penzance, M r. R a lfs.
Geogk. D ist r . England.
D escr. Filaments several inches to a foot or more in length, as thick as hog’s
bristle, variously curved and twisted, forming extensive loosely packed
bundles or strata, which fill the pools in which they grow. Articulations
once and a half as long as broad, filled with a dark greeu lluid, at
length separating by a transverse medial line into two portions, whioli
eventually become separate joints. Colour dark green, not variegated.
Substance rigid, not adhering to paper in di-ying.
I have been favoured by the Rev. M. J. Berkeley with a
portion of the specimen which he figured in the ‘ Gleanings,’
when founding the present species; and it so nearly resembles
a plant which I have received from Mr. Ralfs, that I have ventured
to consider both as belonging to one species; but, to
prevent mistakes, I may remark that the figure now given has
been taken from Mr. Ralfs’ specimen. The general habit of the
plant is very similar indeed to that of C. linum, mixed with
which Mr. Berkeley found it growing; it forms similar loosely
bundled masses; but the diameter of the filament is less, and the
joints are proportionahly longer.
B. Eig. 1 Conferva sutoria ;—natural size. 3. Portion of a filament:—magnijied.