What is special about Voynich plants?

[Koen G]

Hi Marco, 
I like this question, it's open and may lead to some new insights. I'll do my best to see with an unbiased eye. Let's see.

First image: 
1) The Voynich plant has been given prominent, strange roots while the other plants have smaller and more natural looking roots.
2) The Voynich plant appears to be inspired by a similar symmetrical design, but doesn't seem too concerned with actual symmetry. Some of the other plants are more symmetrical.

Second image:
1) More variation in the roots here, but the VM still has the weirdest one.
2) If you look at the flowers in the top middle, you see that the VM has the stalks splitting and rejoining. I may be mistaken, but I don't see such a trait in the other plants. Does this happen in nature?
3) VM appears to show more variation in the color of the leaves.

Third image:
1) VM roots have again been given a twist: they are drawn in four "braided" pairs.
2) In this one, it is clearly visible that the VM does something special to the place where the roots join the rest of the plant.

Fourth image:
1) VM plant is shown in a different perspective ("from the top"), while the other manuscripts use the same side view.
2) VM plant omits the "flowers" (?), which all other MSs do depict.

Conclusions from this sample alone:
- VM adds more unnatural elements, mostly in the roots but perhaps also in other parts.
- VM design appears inspired by similar sources at some times.
- VM design is completely different at other times, showing a plant or plant part from an unusual angle.