Three-section orbs

[ReneZ]

It's undeniably true that the rosettes page, Q13 and some other folios are connected, and studying this topic may lead to useful insights. But let's not forget that large majority of folios in this manuscript bear no visual resemblance to the rosettes family at all. Plants, Zodiac and Q20 are of a different breed, despite the occasional overlap.

Here's a diagram I had in mind for a while now. It shows the similarity between illustrations from the various sections. If a cell is light green, they have something specific in common, and this is written in bold.
   

This connects Herbal, pharma, rosettes and astro/cosmo on the one hand, and bio and zodiac on the other.

Yellow cells share the same type of stars, which are not such a strong link as they are quite basic shapes.

Pink cells have individual stylistic commonalities or details. 'Circles' just means circular diagrams.
The two larger groups are most linked through the zodiac and astro/cosmo illustrations.
The individual letters refer to:
L = both have abundant labels
C = both have circular texts.

All in all, it seems quite coherent and connected. Specifically, the rosettes folio has something to share with all other sections.

Edit: previous edit corrected