Tag Archive for: witches butter

For one reason or another I didn’t get the chance to get out much over winter, but a recent visit to some nearby woodland turned up these little black beauties.

As they were well camouflaged, I nearly walked by this mass of Black Bulgar (Bulgaria inquinans) on a fallen trunk (possibly Ash). There were many dozens of these small black jelly-like buttons scattered across the bark. They genuinely look and feel like a typical jelly fungus, but they’re actually not jelly fungi at all – scientifically speaking, as they are in the class/division of Ascomycetes, instead of the real ‘Jelly fungi’ (heterobasidiomycetes) which are in the division Basidiomycetes. So there you go – lesson over!

They grow in large clusters on deciduous fallen/felled trunks and branches, especially oak, beech and less often, on ash. But with the recent Ash Dieback disease and many felled trees as a result, they may well become more of a common sight.

When young, the margin is tightly enrolled, giving the fruiting body a tiny cup like appearance with a brown/dark drown outer surface which has a rough, scurfy texture. As they mature they spread out flat exposing their smooth ‘spore bearing’ top side in a distinctive disc shape. The ‘gummie bear’ flesh inside is dark ochre-brown which is more rubbery and gelatinous in damp conditions. It becomes much tougher as it begins to dry out.

Rubbery or tough – it doesn’t really mater because this isn’t a fungus for the foragers list. However, in Northeastern China it is considered a delicacy. After careful preparation I believe it’s fine to eat – but quite poisonous otherwise. Phytochromes (photoreceptors in fruiting body pigment) can cause serious food-sensitised solar dermatitis – which sounds rather uncomfortable. I think I’ll give it a miss!

Top: Flat disc shapes of the mature fruiting bodies. Bottom left: Younger cup like examples with a scurfy brown exterior. Due to the damp conditions, this surface appears much darker.