Matching Plant Images Internally

[Aga Tentakulus]

And finally beware that there are millions of plant species

That may be true, but I am only considering those that occur at the possible site of origin of the VM. There are approximately 12,000 of them.
Furthermore, the plants were also compared with classic medicinal plants, both today and in the past.
As you yourself said, you have not been actively involved in VM research for 20 years. I can see that you are not up to date.
And also take into account that these are drawings. There were no cameras in the Middle Ages.
The opinion that these are mainly fantasy plants is simply based on ignorance and is nonsense.