Drawings of the era show the two generals meeting under a large tree, In the one shown here, Lee appears to be looking over terms of the surrender.
|James Fuller Queen, artist/Library of Congress
|Alfred R. Waud, artst/Library of Congress
Update: Since posting this, I've read as many as five trees may have been felled that day at Appomattox Court House. At least one of them is said to have been an apple tree.