C. fruticulosa C. hemisphaerica C. morchella C. porioides C. sphaerosperma Ceratiomyxa is a genus of plasmodial slime mould within the Eumycetozoa, first described by Pier Antonio Micheli.

The plasmodium often appears as white frost-like growth or thin watery layers on wood.

Pillar or wall-like sporangia bud from the plasmodium and develop spores that undergo multiple divisions before they release flagellated zoospores.

The most notable member is Ceratiomyxa fruticulosa, a slime mould found in most parts of the world.

Large logs and stumps are cited as ideal substrates for growth, although smaller colonies can also be found a tree branches.

The Ceratiomyxa collection of Henry C. Gilbert has specimen growing on various evergreen coniferous trees (Pseudotsuga), elm (Ulmus), maple (Acer), oak (Quercus), Tilia, and willows (Salix).

Often translucent or white in colour but can also be tinted slightly yellow, pink, or blue-green.

[1] Ceratiomyxa plasmodia is diploid and can often be found emerging from rotting wood and spreading into a thin layer.

After the stalks have fully elongated, a thin transparent wall is secreted around the protospores to become spores.

The protoplasts then form short thread-like filaments that later retract back into round globules.

The swarm cells may then lose their flagella and become asexual myxamoebae or undergo syngamy in pairs to produce a diploid zygote.