Anzia is a genus of lichenised ascomycetes in the large family Parmeliaceae. It is a genus of roughly 45 currently accepted species. It was formerly included in the monogeneric family Anziaceae, but this has since been subsumed into the Parmeliaceae. Members of Anzia have a foliose growth form, with a thallus that can anywhere from 2 – 30 cm wide. It is one of the only groups in the family not to have 8-spores in each ascus, but instead has numerous spores in each ascus (varying slightly from ascus to ascus). The genus has a cosmopolitan distribution, but is concentrated in the northern hemisphere, particularly in Japan.