A while back you asked whether or not there was any evidence of mandrake in the VMS. In my initial scan of the drawings I did not see evidence of this plant; however, recently I was reading 'Botany And The Voynich "Roger Bacon" Manuscript Once More' by Robert S. Brumbaugh (Speculum 49, p.548) in which he stated that a colleague of his, Professor Louis Martz, identified one of the smaller plants in f100 (row 2, 6 across on the right) as being a drawing of the mandrake plant. I agree that it does appear to be an accurate match.
Remember this website with the faces in the roots:
(page down to about page 7 to see an illustration of mandrake or womandrake)
Same illustration, different website:
Botany and the Voynich "Roger Bacon" Manuscript Once More, by Robert S. Brumbaugh,
Yale University, Speculum 49 (1974), pp.546-548.