Dioscorides classified plants as "as aromatic, culinary, and medicinal".
This is true: but (according to Nancy Siraisi) medieval versions of De
Materia Medica were arranged *alphabetically*. She repeats this fact
several times through her M&ERM book.
I wonder how the plants
in the VMS were classified (perhaps toxic, culinary, and medicinal)?
If the VMS' herbal section was arranged alphabetically, then perhaps we
could - by assigning 15th Century names for the plants - make an educated
guess as to the underlying language!!!!!!
Many herbals of the time - like the one you linked to recently at the
Bodleian - commence each page with a list of names of the plant on that
page in various languages: so this might be an excellent direction to take
this now. :-)