The Recreation and Parks Department of Los Angeles have a website that has every tree at every park in Los Angeles on a map.
You Zoom in on the park, and click on individual trees, many of which have detail information and photos of the species, including the cost and benefit of each tree in dollars!
I will stop complaining about the trees at Rancho now!
Awesome!
note – The search was weird. I always have to zoom out from where it puts me…