I believe the tree these flowers were on is called the Jane Magnolia.
I was at the Fullerton (California) Arboretum last weekend and saw this tree in full bloom!
What a beautiful sight it is.
But...the name of this tree was no where to be found, that I could see.
So...the handy dandy internet helped.
I think I matched these images correctly.
Now that I have seen better photos, I am sure this is NOT the Jane Magnolia Tree.
I'll continue my search...
Thank you, Arija, from Garden Delights!
I now know it is an Orchid Tree!
These flowers are also known as the Matilija Poppy.
...or the Tree Poppy.
They like to reach for the sky!
They are massive shrubs.
These are growing on three sides of this building.
I am not sure why they can be called "Tree Poppies" when they grow as a shrub.
They can be found on hillsides in coastal canyons in Southern California and parts of Mexico.