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
Carex rosea the vascular plants. The superdivision of "Carex rosea" is spermatophyta, also known as seed plants. The division of this plant is magnoliophyta, which is flowering plants. This plant belongs to the class called liliopsida. The subclass of "Carex rosea" is commelinidae, and finally the order is Cyperales. "Carex" is a genus of grasslike herbs that are widely distributed and distinguished having the seedlike achenes enclosed in a sac in the axil of a bract. According to results from a complete ITS sequence based phylogeny, "Carex rosea" is sister to "Carex radiata", "Carex retroflexa", "Carex texensis", and "Carex socialis". This plant