Hypoxylon intermedium (Schwein.: Fr.) Y.-M. Ju & J. D. Rogers
TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES
We did not find the anamorph of this fungus in cultures, nor did Petrini and Müller (1986) [as H. fraxinophilum]. A Sporothrix-like conidiogenous structure was described by Greenhalgh and Chesters (1968) [as H. argillaceum].
The name Sphaeria intermedia is sanctioned in the Index of Fries' Systema (Fries, 1832), and should be considered as if conserved against its competing synonyms and homonyms [ICBN Art. 13.1 (d)]. When S. intermedia is transferred to Hypoxylon, Hypoxylon intermedium Speg., a competing homonym, becomes illegitimate and is subject to rejection. Sphaeria argillacea Pers., although an earlier homonym of Sphaeria argillacea Fr. [= H. fragiforme (Pers.: Fr.) J. Kickx fil.], is rejected owing to the latter being sanctioned in Fries' Systema (Fries, 1823) [ICBN Art. 13.1 (d)].
Hypoxylon intermedium is highly associated with Fraxinus. It is one of the few Hypoxylon taxa with an ascal apical ring which is highly reduced or lacking, and does not stain in Melzer's reagent.