Puccinia malvacearum, known as the Hollyhock Rust, is a type of pathogenic fungus primarily affecting plants in the Malvaceae family, such as hollyhocks (Alcea), mallows (Malva), and other closely related species. This fungus is known for its distinctive rust-like appearance on the leaves of infected plants.

Characteristics:

• Appearance: The fungus produces small, orange to brownish pustules, generally on the underside of leaves. These pustules are the reproductive bodies of the fungus.
• Life Cycle: P. malvacearum has a simple life cycle with spore formation occurring directly on the affected plants without an alternative host.
• Symptoms: Infected leaves often show yellowing or chlorosis, and severe infections can lead to defoliation.

Impact and Management in the Comunidad Valenciana:

• This region, known for its diverse plant life, can occasionally see local outbreaks of Puccinia malvacearum, particularly in gardens and areas where the plant hosts are prevalent.
• Management typically involves the removal of infected leaves and improving air circulation around plants to reduce humidity levels.
• In some cases, fungicidal treatments may be used to manage severe infections, particularly in ornamental plantings.

The name Pustulina del Malvón might be used locally to refer to this specific fungus due to its prevalence on Malva species in the region, emphasizing its significance within the local flora of the Comunidad Valenciana.