s A Field Guide to the British Seaweeds - NMBAQC

Cladophora sp.
Highly branched filamentous species with a dense
reticulate chloroplast with cells appearing uniformly
green and with numerous pyrenoids visible on staining.
Found as tufts or bushy plants throughout the intertidal
but primarily on the upper and mid shore on open rock
surfaces and within rockpools.
Cladophora albida – consisting
of very fine and narrow filaments
generally less than 20um wide. It
is delicate, fluffy and light green in
colour with rounded apical cells
and often epiphytic.
Cladophora sericea – consisting of
broad filaments >80um but lighter
green in colour and less densely
tufted/branched. Branching various
including dichotomous and secund or
comb-like with narrowing apices.
Cladophora rupestris – consisting of
broad filaments >80um as dark green
and course, stiff, dense tufts with
clear multidichotomous branching and
may have 5-6 branches arising from 1
cell. Often supporting epiphytes.