The big tree in the middle of this picture is the Centennial Tree on the Main Post in the Presidio. The National Park Service gives such a wonderful description of its origin that I will quote it in full:
"In 1876, the post's trader, Angelo Marcian Gasper Beretta, planted three eucalyptus trees in honor of his three daughters to celebrate the centennial of the American Revolution. The Army cleared the area for a new parade ground but left one of the trees, the Centennial Tree, which still stands near the center of the parade ground . . ."
I think all patriotic Americans can appreciate Beretta's gesture and the Army's decision to save one of the trees for posterity. What I love about this story is the haphazard process by which we arrived at a centennial tree in a prominent place in a national park. History is so messy.
By citing this account, I am correcting my own blog post in which I said the Army planted the Centennial tree. It turns out the Army only spared its life. Beretta planted it. No word yet on which of the daughters had the satisfaction of seeing her tree saved.
Also worth noting is the Bicentennial Tree next to it. A plaque near the tree says, "Commemorating 200 years of America's freedom. Sequoia Chapter NSDAR. March 7, 1976." NSDAR would be National Society of the Daughters of the American Revolution.
It's great to see lots of people and organizations pitching in to make the Presidio what it is.