My pet theory

[eggyk]

Your view on f90v1 isn't a million miles from something I wondered, though rather than crown I wondered if it was the lion + fleur-de-lis (iris)
It would be along the same road of symbolism, though I'm not sure how much it stretch's or how identifiable people would find many of the others

It's one of those things that would be quite obvious to the right person, with the right context. The plant would represent a coat of arms, and then the people follow. For this theory to make sense, the recipient of the book, or the reader would have to either have access to coats of arms, or know which one refers to which (perhaps a colloquial name, or another aspect related to the subject would work too). 

I had some fun and made one, I think if you know its meant to represent something (a state, a coat of arms, a flag) it's pretty clear what's being referred to on this fake page i think. I could have also gone with some kind of eagle and stars symbolism, or something else instead of a literal copy of the flag.