Alcea "Alcea" species are used as food plants by the larvae of some Lepidoptera species including "Bucculatrix quadrigemina" and "Vanessa cardui", the painted lady. The mallow flea beetle ("Podagrica fuscicornis") is a pest that makes tiny holes in the leaves. Cutworms, aphids, and capsid bugs use the plant as a food source in hotter and drier conditions. A number of weevils use "A. rosea" as their host plant, including "Rhopalapion longirostre", "Alocentron curvirostre", and "Aspidapion validum". The plants are also susceptible to the pathogenic fungus "Puccinia malvacearum", the hollyhock rust. A hollyhock flower, known in Japan as , was incorporated into
Mycena rosea Mycena rosea Mycena rosea, commonly known as the rosy bonnet, is a species of mushroom in the Mycenaceae family. First named "Agaricus roseus" in 1803 by Danish botanist Heinrich Christian Friedrich Schumacher, it was given its present name in 1912 by Gramberg. The cap initially has a convex shape before flattening; its diameter may reach up to . "Mycena sororius" is a closely related species that has been reliably distinguished from "M. rosea" by the electrophoretic migration of isozymes, as well as having larger spores—7.5–8.5 to 10 by 4.8–5.5 µm, compared to 6.5–9 by 4.5–5 µm for "M. rosea". The