You are looking at the Wrong Area. The "Two Sprig Tree" I questioned is shown to be (S) of the Pergola Shelter/Between the shelter and Elm St. In this pic you posted, you are looking (N) of that Pergola Shelter. For a a good look at this area (S) of the Pergola Shelter, look at the 6th Photo on the "Allen Gallery" posted on this Forum's "JFK Assassination Photo Gallery". It's the pic looking directly at the Hammer Man as he walks across Elm St. There is NO Sprig Tree.
The sixth Allen photo in the gallery does show the same area as James’ image. The reason the tree doesn’t show up in the Allen photo is simply because there are people standing between Allen’s camera and the tree blocking the view of the tree.
In the following two cropped images, I have drawn a red arrow to the other nearby Yaupon Holly tree that is in that vicinity but closer to the picket fence.
(The image hosting site that I use is having a reoccurring technical problem at this time. I will try later to post these images.)
What I am saying is that the red arrows drawn in the following two images are pointing at the same tree. And the second small tree shown in James Hackerott’s image is simply hidden from the camera’s viewpoint by the people standing in the way.

