The English flora - SeaweedAfrica

Tyndaridea.] hL&M CONFERVOIDEiE. 361
69. Tyndaridea. i JBory. Tyndaridea.
Filaments simple, finally inosculating by transverse tubes.
Endochrome consisting of two subrotund masses (stelhe), which,
after conjugation, unite and form a roundish globule (sporidiumj,
lodged either in one of the articulations, or in the connecting
tube.—Name : Tyndaridce ; the constellations so called of
Castor and Pollux, incorrectly spelled " Tendaridca" by Bory
in Diet. Class. oV Hist. Nat.
1. T. crucidta, Harv. (cross-like Tyndaridea); stellse round
ish, sporidia subglobose lodged in one of the filaments.
nema cruciatum, Z. gracile and decussatum, Ag. Syst. Alg. p. 77
—78.— Conferva bipimctata, Dillw. Conf. f. 2, and C. decussata,
Syn. Conf. p. 51.
—
Zyg-
In ditches and pools, common.—This forms extensive masses, of a
yellowish-green colour, finally rising to the surface. Articulations
marked by two roundish dots, which, after conjugation, unite to form a
globular sporidium in one of the filaments.
2. T. epigcea, Harv. (ground Tyndaridea); " filaments interwoven
into a crisped stratum, articulations once and a half as
long as broad, granular mass dense scarcely bipartite, sporidia
globose lodged in one of the filaments." Cann— Zygncitta epigceum,
Carm. JISS.
On road-sides and frequented paths; Spring to Autumn, Capt. Carmichacl.—
" Filaments an inch or more in length, as thick as those ofjT.
crttciata, spreading, to an indefinite extent, in a thin intricate yellowish
fleece over the dry naked earth; here and there grouped and curled in
a most characteristic manner. Articulations 1 — 3 times longer than
broad, and remarkably opaque ; internal mass partially separating into
two square smooth portions. Sporidia sphaerical, lodged in one ot the
filaments." Carat. MSS.
3. T.pectindta, Harv. MSS. (comb-like Tyndaridea); stellse
transversely linear pectinate, globules contained in the swollen
transverse tubes.— Zygnerna pectinatum, Ay. Syst. Alg.p* 78.
Conferva bipunctata, E, BoU t. 1610, (not t. 2463,/ B.).— C.
tripartita, 11 Bot. t. -2-W-2 ?
In stagnant water, common.— "This, like Z. crueiatum, occurs in
larL'c yellow i>h Boating iiiiisms. They are often found intermixed, nor
is there any thing to distinguish them from each other, in tluir usual
state, but the transversely oblong shape of the internal dots; which
results probably from the shortness of tin- articulations. In a stale t
junction, however, tin- position of the sporidia leaves uo doubt that the\
are distinct species.* 1
Carm, MSS.
-1. T.bicolor, Harv. MSS. (variegated Tyndaridea); mtaneoti
simple slender straight bright-green, joints thrice a- long as
broad vrhite-edged even mi eraJ of them together here and there
empty white and pellucid,— Conferva tricolor,
n stones, in a rapid streamlet at Henfield, Sussex, .1/ • B
/.'. Ht. t 2288.
'>"•.
i lii the Synopsis of the General thjs in inaceuratelj ipelled Tentaridea, ami
the character ii different from the amended one here given. W, II Harvey.
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