Hypoxylon ochraceum Henn.
TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES
Cultures and anamorph have been described by Rogers and Samuels (1985) [as H. dumontii] on 2% OA.
Miller (1961) treated H. ochraceum as a synonym of H. haematostroma. On the other hand, he identified several specimens of H. ochraceum, now at BPI, as H. crocopeplum and one specimen from Trinidad, now at GAM, as H. vogesiacum.
The type of H. pumilio, unlike other collections from tropical or subtropical regions, was collected from New York. Its stromatal characteristics are the same as the typical H. crocopeplum in eastern United States, but the ascospore morphology in general agrees with that of H. ochraceum.
Martin's (1969a) description and color photograph show that H. aureostroma has the stromatal habit of H. ochraceum. Furthermore, the ascospore morphology and the anamorphic features that he described are largely those of H. ochraceum. We have not seen the type of H. aureostroma but have seen authentic material, GAM 4648, which was considered by Martin (1969a) to be this fungus. This material, labeled as H. vogesiacum by Miller but listed as H. rubrostromaticum in his monograph (Miller, 1961), is fully in accordance with H. ochraceum.
Hypoxylon ochraceum and H. cinnabarinum are differentiated by the length of the germ slit; the former has a germ slit less than spore-length, whereas the latter has a spore-length one. Hypoxylon ochraceum is the only Hypoxylon known to have produced the teleomorph in culture (Rogers and Samuels, 1985) [as H. dumontii]. The Hennings types of H. ochraceum and H. juruensis at B no longer exist; the duplicates of the two specimens at S are chosen as the lectotypes.