If you do the geometry, I think you'll find that using a very wide angle lens, for objects like trees, less relevant.
I think if you do the geometry, the most relevant is very tight framing of very close Objects or Subjects and when using very large aperture lenses, wide open. . . so for a 14mm lens that would mean a "small" tree (or let's say for an easier comparison a face of a person really really close, maybe about 500~600mm SD).
For a typical small tree (let's say 6ft or 2m high) and at about 6ft or 2000mm and let's say you want it way off to the side of the frame and you focus and recompose by TWISTING the camera - you'll get something like this, which was shot with a 14mm lens on a 5DMkII . . .
I think if you draw the geometry for that shot, and if the shot were to use F/2.8 (which I think is the fastest 14mm lens available) at a SD = 2000mm the DoF is about 5800mm, and well within the "twist" of the plane of sharp focus if you were to use that technique for Recomposing.
The above is all supposition, and I haven't done the Maths/Geometry of these shots - but my supposition is based upon making many shots like this and using Focus and Recompose Techniques for many years.
WW