Hypoxylon monticulosum Mont.
TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES
Saccardo (1883, 1891) substituted H. berkeleyi for H. mascariensis because he believed that the former was a later homonym of a Montagne species. Montagne (1841, 1856) had, in reality, named a species, not of Hypoxylon, as Sphaeria mascarenensis Mont. which was transferred to Botryosphaeria as B. mascarenensis [as "mascarensis"] (Mont.) Sacc. by Saccardo (1882a).
Hypoxylon monticulosum is commonly found in the tropics and the subtropics. It differs from its temperate counterpart H. submonticulosum in having darker, more inequilateral ascospores, and in having a spore-length germ slit. In addition, H. submonticulosum has a perispore that frequently is not dehiscent in 10% KOH. It is noteworthy that the purplish stromatal pigments [dark livid (80) to dark vinaceous (82)] of H. monticulosum and H. submonticulosum are easily detected in the young, rusty brown stromata but are hardly so in the mature, blackened stromata. Most specimens determined by the late J. H. Miller as H. investiens and H. investiens var. epiphaeum are H. monticulosum and H. submonticulosum. Also see NOTES on H. investiens and compare with H. rubigineoareolatum.