| Hypoxylon fragiforme | |
|---|---|
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Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Sordariomycetes |
| Order: | Xylariales |
| Family: | Hypoxylaceae |
| Genus: | Hypoxylon |
| Species: | H. fragiforme |
| Binomial name | |
| Hypoxylon fragiforme (Pers.) J.Kickx f. (1835) | |
| Synonyms | |
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Hypoxylon fragiforme is a multiperitheciate carbonaceous pyrenomycete known from Europe and North America.
It is saprobic on wood, mostly beech. The semispherical lumps are up to 15 millimetres (5⁄8 in) wide and covered with 15–25 bumps in maturity. The flesh is hard and black. [1] Specimens are reddish when young, and they produce orange pigments when mixed with KOH.
Similar species include Hypoxylon howeianum , which can be differentiated microscopically by smaller ascospores. The anamorph of H. fragiforme sits on a fuzzy green subiculum while the anamorph of H. howeianum sits on radiating hyphal cords, reminiscent of a white spiderweb-like structure. [2] [3]
Other similar species exist within Annulohypoxylon , Nemania , and Rosellinia . [1]