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).