Exidia nigricans


Common Names: Black witches' butter
Category: Fungi
Sub-category: Jelly Fungus

It is a common, wood-rotting species throughout the northern hemisphere. Dark sepia to blackish, rubbery-gelatinous fruit bodies that are button-shaped and around 2 cm across. The fruitbodies occur in clusters and quickly coalesce to form effused, irregular masses 10 cm or more across. The upper, spore-bearing surface is shiny and dotted with small pimples or pegs. The individual fruitbodies are each attached to the wood at the base. The spore print is white. Exidia nigricans and E. glandulosa are frequently confused. The two are similar, but E. glandulosa produces discrete, top-shaped fruitbodies that rarely if ever coalesce. They are indistinguishable microscopically, but DNA research indicates they are distinct. Tremella foliacea is usually a warmer, lighter brown, but can sometimes be dark sepia to black. Its fruitbodies are gelatinous, but usually foliaceous (with flattish lobes or fronds) and never have warts or pegs on the surface. It is common and occurs on both broadleaf trees and conifers.

Typically found growing on dead attached branches of broadleaf trees. The species typically fruits in autumn and winter.

Edible Notes: No available information on edibility.
Warnings: Not known to be dangerous.
Sightings