HYPOXYLON UDUM (PERS.: FR.) FR.
This name does not belong to Ascovirgaria, Biscogniauxia, Creosphaeria, Daldinia, Discoxylaria, Entoleuca, Hypoxylon, Jumillera, Kretzschmaria, Kretzschmariella, Nemania, Stilbohypoxylon, Vivantia, or Whalleya.(The accepted or suggested disposition is indicated by an asterisk (*), if there is any.)
Hypoxylon udum (Pers. : Fr.) Fr., Summa Veg. Scand. 2: 384 (1849).
º Nemania uda (Pers. : Fr.) S. F. Gray, Nat. Arr. Brit. Pl.: 516 (1821).
º Sphaeria uda Pers., Römer's Neues Mag. Bot. 1: 83 (1994) : Fr., Syst. Mycol. 2: 358 (1823).
º Anthostomella uda (Pers. : Fr.) P. Martin, J. S. African Bot. 42: 71 (1976).
º * Euepixylon udum (Pers. : Fr.) Læssøe & Spooner, Kew Bull. 49: 41 (1994).
LOCALITY UNKNOWN: on wood, as Sphaeria uda (BPI [C. L. Shear's microscope slide coll., ex Persoon Herb.]).
As mentioned by Miller (1961), the only material labeled as Sphaeria uda by Persoon at L is Nemania serpens (Pers. : Fr.) S. F. Gray. Shear's microscope slide reaffirms Miller's statement. Miller (1961) followed Fries' interpretation of H. udum based on Fries' specimen at K [Sclerom. Suec. Exs. 324] which may at best be regarded as the epitype in order to accommodate the widely-accepted concept of H. udum sensu J. H. Miller. Also see Læssøe & Spooner (1994). Euepixylon Füsting can include H. udum sensu J. H. Miller and H. sphaeriostomum (Schwein.) Sacc. because their germination sites are created by the dehiscence of a circular area in the epispore rather than a void or slit beneath the epispore as seen in most xylariaceous fungi. Also see Læssøe and Spooner (1994).
