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
Sarracenia rosea "Sarracenia rosea" f. "luteola". The species is native to the Gulf Coast of the Southeastern United States, and has been found from Mississippi to Georgia. However, the areas in which the plant occurs are being developed, so the species's habitat is threatened. However along with "Sarracenia psittacina", this species readily colonizes drainage ditches along highways throughout the gulf states providing a somewhat more sustainable albeit less natural habitat. "S. rosea" is appreciably more shade-tolerant than the other members of the genus. "Sarracenia rosea" was first identified by the American botanist Edgar T. Wherry as a "mutant" form of "S. purpurea"