The English flora - SeaweedAfrica

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358 ALGJE cONFERVOIDEiE [Conferva.
40. C. diffusa, Roth, (diffuse green Conferva); filaments
membranaceous rigid dark-green flexuose subdicliotomous,
branches distant elongated furnished towards the top with a few
short patent secund ramuli, articulations &—4 times longer than
broad.— Dillw. Conf t.2\. E.Bot.t.2289. Ag. Syst. Alg. p. 116.
— C. distans, Ag. Syst. Alg. p. 120.
Marine rocks ; Swansea, Dillwyn. Devonshire, Mrs. Griffiths. Miltown
Malbay, W. H. Harvey.— Nearly allied to C. nqjestris, but differing
in habit. Agardh founds a species on the British C. diffusa, which
he calls C. distans ,• and states it to be nearly allied to C.pellucida. Our
plant, which we are convinced is that of Mertens and Roth, is very
nearly allied to C. rupestris, but not at all to C. pellucida.
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41. C. dlbida, Huds. (whitish cottony Conferva); filaments
very slender capillary flaccid pale yellow-green forming dense
silky tufts, branches crowded irregular, the uppermost ones
patent and mostly opposite, ramuli opposite or secund, articu-
Dillw. Conf. Syn. p. 66.
/. E.—E. Bot. t. 2327.— C. heterochloa, Ag. Syst. Alg. p. 1 IS-
lations 4—5 times longer than broad.
C', refracta, Ag. Syst. Alg. p. 114, (reference to E. B.)— /3.
protensa; elongated, ramuli straight patent irregular. Dillw. Conf.
On other Algce ; perhaps common. Cromer, Mr. Turner. Bantry,
Miss Hutchins. Brighton, Mr. Borrer. Torbay, Mrs. Griffiths.— Filaments
very slender, excessively branched and tufted, pale-green, quickly
fading to a dirty white, lesser branches opposite. Habit very nearly
that of an Ectocarpus.
42. C. lanosa, Roth, (woolly green Conferva); filaments slender
short yellow-green forming dense tufts, branches virgate erect
subdistant straight alternate or opposite, with a few alternate or
secund ramuli, axils very acute, lower articulations twice, upper
six times as long as broad.
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Dillw. Conf. Syn. t. E.—E. Bot.
*. 2099. Ag. Syst. Alg. p. 112.
On rocks and the larger Algce ; not uncommon.— Filaments forming entangled
woolly tufts, an inch long, pale-green, stoloniferous below,
branches straight and erect, all the axils very acute. It adheres to paper
in drying, and in that state is usually of a dull whitish-green, without
gloss :— nearly allied to C. arcta.
43. C. centralis, Lyngb. (radiating green Conferva); filaments
elongated forming broad somewhat starry tufts of a full-green
colour much branched, branches straight crowded erect, ramuli
sub-appressed opposite or alternate, articulations
as broad.
twice as long
Lyngb. Hydroph. Dan. p. 161. t. 56. El. Dan.
Rocks on the verge of high-water mark. Bathing Cove, Torquay,
Mrs. Griffiths.— Tufts flat, round, radiating from the centre : jilaments
2— 6 inches long, slender, much branched, and somewhat interwoven,
stoloniferous, of a bright-green colour, which is but partially preserved
in drying ; joints pretty regularly twice as long as broad throughout the
filament. The figure in Fl. Dan. is strikingly characteristic of our specimens,
especially the magnified portion ; that hi Lyngbyc's work is not
so good.