Plants are a special group. They can be common and extinct at the same time. Some because exist only in gardens and collections, but we should take in mind als

Plants are a special group. They can be common and extinct at the same time. Some because exist only in gardens and collections, but we should take in mind also that a 1 year old ash and a 500 year old ash are totally different ecosystems. the first is very common, the second is impossible to find in most areas and the very rich pool of species that the old tree support could have vanished long time ago from the area. We should treat them as different (eco?)-species or something. We need a category for that beyond the specific one. Cycas in a pot and 1000 years old Cycas are totally different things.