Melampsoraceae dangi ne na fungi wanda ke cikin tsari na Pucciniales, wanda akafi sani da tsatsa fungi. Wadannan fungi suna da alaƙa da kasancewar sifofi masu kama da tsatsa a kan ganyen tsire-tsire, waɗanda ke haifar da girma da haifuwa na fungi. Iyalin sun haɗa da nau'ikan fungi masu tsatsa, irin su Melampsora, Cronartium, da Gymnosporangium, waɗanda aka sani suna cutar da nau'ikan tsire-tsire iri-iri, gami da bishiyoyi, shrubs, da tsire-tsire masu tsire-tsire.