I don't remember exactly where I found this model, but it was some kind of free sample from some Blender or LightWave plug-in. The model is rather simple and it was free, so I don't pay attention to the source of origin.
In fact, the best part of this tree is the texture.

At the moment there are more important things to do than procedural objects. Oh, maybe procedural terrain would be useful, but I'll do it later. GLScene has it all, but it takes a some time to figure out how this things works.