Armillaria luteobubalina

Armillaria luteobubalina, commonly known as the Australian honey fungus, is a species of mushroom in the family Physalacriaceae. It is responsible for a disease known as Armillaria root rot, a primary cause of Eucalyptus tree death and forest dieback. Fruit bodies have cream- to tan-coloured caps that grow up to 10 cm in diameter.