On the corner of Osborne and Hospital Avenue, there is a large sycamore tree, shown here.
About 4ft in diameter or 12.5ft in circumference. The tree was definitely on that spot when WestConn was founded in 1903.
Here are some examples where this tree photo bombed images of the midtown campus.
This is that corner in a bird’s eye map from 1880 – the artist did place a tree in the area.
One can just make out the tree in an aerial photograph from the early twenties.
Another view around the same time.
Here it is below a bit more clearly from the late 1920s. To the left, it is just visible from a 1929 aerial photo.
Here it is, clearly visible in a 1949 aerial photograph.