Voynich style herbs+text wrapping: BSB Cgm 728

[Bernd]

For this reason, we also most often see color annotations where they matter: the color of a plant's blooms, or heraldic insignia. But not for generic stuff.

This would make sense, but is it really the case? Are the color annotations found where it matters the most? Most flowers don't have color annotations, but some leaves do. They're green, duh. Was the red for the root important? The annotations appear completely arbitrary to me, but maybe there is a pattern.