Gardd Fotaneg Genedlaethol CymruNational Botanic Garden of WalesNational Botanic Garden of Wales

King Alfred’s Cakes

Doldinia concentrica

Round black fungus on ash trees

If you’re out camping and are having trouble lighting a camp fire, this King Alfred’s Cakes fungus could come in handy. Found on dead ash branches in our Trawscoed Wood, it will easily take a spark if dry and will burn slowly.

Open it up with a knife and you’ll see concentric rings inside – this explains its Latin name. You might also see little insects living inside.