Ceramium deslongchampsii is a small marine red alga in the Division Rhodophyta.
This species is a relatively small alga growing as dense tufts to no more than 12 cm long. Grows as densely branched monosiphonous axes[1] consisting of large cells showing cortication only at the nodes.[2] [3] It branches pseudodichotomously but with abundant adventitious branches. The tips of the branches are straight or slightly in-rolled and without spines. The prostrate axes are attached by rhizoids.[2]
Spermatangial sori, cystocarps and tetrasporangia are recorded.[2]
To be found on the rock, dead shells and other algae to a depth of 26 m.[2]
Generally common around Britain and Ireland.[4] Recorded in Europe from Norway to France and the Mediterranean.[2]