Hypoxylon perforatum (Schwein.: Fr.) Fr.

TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES

NOTES

Cultures and anamorph have been described by Petrini and Müller (1986) [as H. rubiginosum var. perforatum] on MA.

Three packets labeled as Sphaeria perforata were examined from PH. Two of these are among the Collins collections. The other one encloses material that is attached to two autographed paper cards of Schweinitz and material that is wrapped. Schweinitz wrote "Sphaeria perforata" on one paper card on which two pieces of specimens were glued. The lower piece is considered to be the lectotype of Sphaeria perforata. The upper piece is H. fuscum and should not serve as the type. He wrote "Sphaeria perforata var. minor", an unpublished name, on the other paper card; no distinction can be recognized between this variety "minor" and the typical variety . As for the Collins collections, specimen 28 is H. perforatum, whereas specimen 309 is not a Hypoxylon. The type of Sphaeria leucostigma was not located at K or PC.

Hypoxylon perforatum has a world-wide distribution. Its peculiar light greenish yellow stromatal pigment is a constant characteristic by which to recognize this fungus. Miller (1961) considered it to be a synonym of H. rubiginosum. Petrini and Müller (1986) considered it to be a variety of H. rubiginosum. Hypoxylon perforatum and H. rubiginosum differ in colors of stromatal granules, in colors of KOH-extractable pigments, in cultural morphology, and in anamorphs. Moreover, Hypoxylon perforatum usually has conspicuous white material deposited around the ostioles. It is noteworthy that colonies on SMEA normally produce compact hyphal tufts which are also commonly seen in those of H. museum and H. notatum.