How is Joseph Hooker linked to Errol Flynn?

Errol, the hero Robin Hood, is sitting in Joseph Hooker's Oak in Chico California

So is Maid Marion!!!

The Joseph Hooker Oak was an extremely large valley oak tree (Quercus lobata) in Chico, California. Amateur botanist and local socialite Annie Bidwell, whose husband had founded Chico, named the tree in 1887 after our local hero English botanist and Director of the Royal Botanical Gardens Sir Joseph Dalton Hooker visited the tree.. It was featured in the 1938 film The Adventures of Robin Hood starring Eroll Flynn.  
The Joseph Hooker Oak tree was considered at one time to be the largest valley oak in the world.After it fell in 1977 it was discovered to not be a single tree, but two large trees that had grown together. Despite this fact, it was still a beautiful and amazing sight.
The tree was symbolic in Chico, and the stump can still be found at Hooker Oak Park
You will find one soon on the Halesworth Town Park Joseph Hooker Trail around the perimeter of the park together with other trees and colourful shrubs associated with him

Quercus lobata the Joseph Hooker Oak tree in its prime

Robin Hood!!!!

Our hero Joseph Hooker!!