Much of this information harkens to the so-called Banckes' Herbal of 1525. (Banckes was the printer, the herbal is anonymous). I had been under the impression this was a stand-alone book, but it turns out it is a partial translation of Macer's Herbal
I'm wondering if there isn't a manuscript copy of Macer or some other herbal based on this in the Cambridge library. If so it might provide the common thread to these interesting artistic stylings.
To them I say, millions from McDonald's still can't buy you an ounce of common sense. :-)