Someone with more confidence than I have in Voynichian botanical identification has put an image of f56r on the Wikipedia page for Sundew. Presumably the key feature match was the plant’s alien-style sticky tentacles, that bend forward when they’re touched by prey to entrap it (yes, it’s a carnivorous plant), a mechanism you’ll be delighted to know goes by the name of thigmotropism.
Hmmm… what if there are other carnivorous plants depicted in the VMs? All of a sudden, might our manuscript have acquired a “Little Shop of Horrors” cachet? Altogether now: “Feed me, Seymour… feed me now!“