A jelly fungus with an erect whitish fruiting body and a highly variable shape (sometimes resembling coral fungi).

But here, instead of coral polyps, it's mycorrhizal fungi and their symbiotic relationship with plants that's the basis for everything.

Any of numerous fungi, especially of the family Clavariaceae, whose often brightly colored spore-bearing structures are club-shaped to intricately branched and resemble coral.