Ceramium virgatum Roth
Ceramium rubrum auctorum; Ceramium nodulosum
Description: Cartilaginous, usually bushy, brownish red
to yellowish green fronds, to 300 mm long. Irregularly
dichotomous, clothed with simple to repeatedly dichotomous
ramuli. Usually completely coticated, branchlets markedly
narrower than main axes, apices normally markedly hooked inwards
(but straight in plants bearing tetrasporangia). Very variable
in size, form and colour.
Habitat: On rock, shells and epiphytic, intertidal and
shallow subtidal, generally distributed, abundant, one of the
most ubiquitous marine algae in the north-eastern Atlantic.
Photographs © M.D. Guiry
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