The 25-foot-tall tree that snapped in half in Bryant Park on Friday, injuring five people, was severely rotted—as are six others still standing in the busy park.

The Post ran photos of the green space by arborist Michael Pill, and Pill diagnosed the half-dozen London plane trees with crown rot, a fungus. Whether or not that means they're in danger of falling is "a matter of how deep the rot is," PIll told the tabloid. More practically speaking, he said, "I don't know know if I'd want to sit under these trees on a windy day."

Of those injured by Friday's fallen tree, one woman suffered a compound arm fracture, and another man was pinned to the ground. Falling trees and tree branches regularly cause serious injuries, and occasionally death around the city.

The Parks Department told the Post it is investigating what caused the Bryant Park tree to topple over, but the Bryant Park Corporation, a private management group, is responsible for actual tree maintenance in the park, and a spokesman declined to comment directly on Pill's findings.