A number of them are quite accurate and naturalistic. Some are stylized. Some may be symbolic. I suspect there's more than one kind of plant drawing, but I don't see overt evidence that they are composites, at least not yet. When people claim this, I notice they often make general comments about plants that are not accurate.
If they are compound plants, it would be almost impossible to identify them (without accompanying readable text) because you would not know which parts belong to which plant. The combinations would be endless.
If they are compound plants, it would be almost impossible to identify them (without accompanying readable text) because you would not know which parts belong to which plant. The combinations would be endless.