There are several species under the name of Honey fungus. This type of fungi spreads underground, attacking and killing roots of perennial plants. The toadstools usually emerge at the base of an infected tree just above the roots, but in some cases they grow out of rhizomorphs well away from the source of infection. The infection may not be visible until the toadstools appear in autumn, but the symptoms include: dead upper parts of the plant; smaller, paller leaves; premature autumn colour; cracking bark; white fungi material with strong smell of mushrooms between wood and bark. It is the most destructive fungal disease in British gardens.