| Name | Hypoxylon udum (Persoon: Fries) Fries |
| Authorship | (Persoon: Fries) Fries |
| Rank | Species |
| Placed in | Hypoxylon |
| Citation | 1849 Summa Veg. Scand. (Fries) 2: 384 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Hypoxylon udum (Persoon: Fries) Fries |
| Identification made in | [no date] (1) |
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