f18v...Dioscorides...something about those leaves

[ReneZ]

One important step would be to compare plants depicted in several herbals to look for differences and similarities. As many plants are not clearly labeled, that's not an easy task but would help a lot.

There must be a great body of literature on these and related herbals, and such a comparison must have been made in the past. This may not be easily accessible, but it seems a worthwhile search.