A healthy green eucalyptus is full of leaves but the infected trees are dead and dying. John Brega is an Oakland Adopt-A-Spot Volunteer for Joaquim Miller Park. He says the problem is enormous.

City spokeswoman Cindy Chin says it's sick and dying with an incurable sulphur fungus, and the tree must be removed for safety purposes. "We didn't really want to take it down," said Chin.

The Eucalyptus tree at Lions Wayside Park, one of the oldest trees in Pleasanton, has been sick with an incurable sulphur fungus that has spread throughout the tree, and will need to be removed.

But now, the Tasmanian blue gum eucalyptus tree that has stood tall at Lions Wayside Park on 4401 First St. in downtown for at least 125 years will have to be cut down because of a sulphur fungus ...

On the trunk of a eucalyptus tree, mushroom conks were growing. A conk is the fruiting body of a bracket or shelf fungus.