The following is understanding that PEP=Permaculture Experiences (according to) Paul, the idea is generalizing some tasks. I wonder if instead of having specific species like black locust or willow, the plants listed should be based on function. There might also be a list of plants (surely some lists already exist out on them interwebs) which fulfill each category, including the growing range like USDA zones, as well as water needs once established (arid - dry - moderate - wet - rainforest).
So instead of saying black locust, perhaps you use "nitrogen fixing tree" or "silvopasture leaf fodder" or "rot resistant wood". Then a person looks at a list like "Nitrogen Fixer Trees: Black Locust, Mimosa, Alder, Redbud, Autumn Olive, Kentucky Coffee Tree, Golden Chain Tree, Acacia, Mesquite, etc etc" and they can find something which will adapt to their existing environment?