Not that I can think of off the top of my head, but I've looked at so many, they have started to blur together.
You do get the occasional drawing of kings in the herbal manuscripts, and sometimes crowns have crosses, but if there are crosses in the crowns, they are not there because of any direct relationship to the plants.
Unfortunately, I don't have enough free time right now to run through the drawings to check for sure, but for the most part, crosses are not thematically prevalent in herbal manuscripts until the later alchemical manuscripts (where kings and queens and crosses are mostly used as metaphors for chemical/spiritual processes). These were not especially common until after the mid-15th century.
You do get the occasional drawing of kings in the herbal manuscripts, and sometimes crowns have crosses, but if there are crosses in the crowns, they are not there because of any direct relationship to the plants.
Unfortunately, I don't have enough free time right now to run through the drawings to check for sure, but for the most part, crosses are not thematically prevalent in herbal manuscripts until the later alchemical manuscripts (where kings and queens and crosses are mostly used as metaphors for chemical/spiritual processes). These were not especially common until after the mid-15th century.