I don't know if the information is known but as I discovered it during some experimentation on cultivation last week, I come to share it with you ...
I thought that there were only 2 class of "plant" in AFS2: "broadleaf" and "conifer". Last days, I have discovered that there are two additional ones: palms and bushes.
In addition, about the tree definition structure in .toc files, a typical declaration of scenproc works a little like the grouping in "FSX", in short the simulator will dig randomly into AFS2 "broadleaf" varieties to plant a tree.
There is another way of gardening, you can specify in "species" definition the name of specific varietie of tree to plant, for example:
And now you are going to ask me: "but how do I find the name corresponding to the tree I want to plant!?"
I would just say go take a look into the AFS2 program folder: "Aerofly FS 2 Flight Simulator \ scenery \ plants"
Do not get tired, I've already done it for you
I did not really understand what the numbers in the file name were, but I think the second number is related to the size of the default tree.
for example: "BroadLeaf_01_1650" should match the model "BroadLeaf" number "01" which is a default size of 16.50 meters
I made some in-game capture of each model, (with a height range of [10; 10). Sorry ! the quality of the screenshot is not terrible but it already gives an idea of the type of tree corresponding to such or such file