| Generic short diagnoses: Immersed discomycetes (tar spot fungi) in leaves of trees or shrubs, opening with one or several, ± irregular slits to expose greyish to buffish discs; with filiform to ± clavate, 0-septate spores. |
Rhytisma acerinum - DK: ahorn-rynkeplet, UK: Sycamore Tarspot |
 | Illustration and © Jens H. Petersen Denmark, JHP-95.077 |
 | Illustration and © Jens H. Petersen Denmark, JHP-04.063 |
 immature stromata on fresh leaves | Illustration and © Jens H. Petersen Denmark, JHP-04.063 |
 immature stromata on winter leaves | Illustration and © Jens H. Petersen Denmark, JHP-04.063 |
 immature stromata on winter leaves | Illustration and © Jens H. Petersen Denmark, JHP-06.315 |
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