Slime Mold
Fuligo septica

Posted on What is this mushroom on 5/13/19
Then I saw it on the Opal Creek Hike H379 on 5/18/15

Slime molds are amoebas and not fungi.

They can actually move across the surface of a log as a slimy mass before eventually stopping when conditions are right and then they turn into a spore mass.

Posted on What is this Mushroom

From Hike to Opal Creek
5/18/15 H379

Although many slime mold species fruit on wood they do not form a penetrating and absorptive mass of hyphae in the wood substrate.

Rather, slime molds form structures called plasmodia which are naked (i.e., without cell walls) masses of protoplasm which can move and engulf particles of food in an amoeboid manner.

Slime mold plasmodia creep about over the surfaces of materials, engulfing bacteria, spores of fungi and plants, protozoa, and particles of nonliving organic matter.

At some point, plasmodia convert into spore-bearing structures.
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Slime molds have a high resistance to toxic levels of metals; one author was prompted to write "The levels of Zn in Fuligo septica were so high (4,000–20,000 ppm) that it is difficult to understand how a living organism can tolerate them. (from Wikipedia)

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