Cladophora graminea Collins

Cladoohora sraminea_ Collins, n. sp.
Bhodora Tl: 19 . Pi .7H . f. A- F 1909.
iYondibus caespites laxos formantibus, 10-15 cm, longis,
cartilagineis, prasinis; filamentis primaries 300 \i diam., dis-
tant er di- trichotomis; ramis omnibus erectis, ramulis ultimxs
100-150 n diam., apicibus obtusis vel subacutis; cellulis in-
ferioribus praelongis, ad 30-plo longioribus quam crassis; sup-
erioribus brevioribus, eis ramorum ultimorum diametro 4.-o-plo
solum longioribus; cellula singula normaliter spatium inter di-
chotomias proximas occupanti; membrana cellulari plerumque valde
striata.
Fronds forcing loose tufts, 10-15 cm. long, cartilaginous,
dark green; main filaments 300 u diam., distantly di- trichotom-
ous; all divisions erect, ultimate divisions 100-150 u diam.,
tips ‘blunt or slightly acute; cells very long, up to 30 diam. be-
low, shorter above, in the ultimate branches 4-6 diam,, each c^ll
normally occupying the space between two successive forkings; cell
wall usually strongly striate. —Monterey to San Pedro, California.
Distinguished from all our other species by the long cells,
each normally extending from one forking to the next; in this it
agrees with 0.. oellucida (Huds,) Kutz. of Europe, but in the lat-
ter there is more reduction of size in the successive orders of
branches, the main filament being sometimes as large as 500 \i diam.
while the ultimate ramuli are seldom over 50 u, and are dense and
more or less fasciculate.. In C.. gramlnea thebe is comparatively
little diminution in size, and the ‘tips"“are loose and open. In
0.	pelluclda the divisions of the di- or trichotomy are usually
equal and develop equally; in C.. ^raminea one is often much reduc-
ed, sometimes being only a single cell. The original specimen was
sent the writer by Mrs. A .E .Bush, under the name of C. oartilagin^a
(r:upr.) Harvey, and there is a certain similarity of habit; but
xluprecht's Conferva cartilaginea is not a true Cladophora. and pro-
bably should be placed in Spongomorpha. Mrs. Bush’s specimen, in
herb. 5\y.C., is the type of 0, ^ramlnea.
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