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Hypoxylon fuscum (16)
Here I post 3 shots of this ascomycete fungus, from an early stage on the first picture, to a mature stage in the last one, where the black stains caused by spore dispersion can be seen.
Stromata pulvinate on bark, rounded, at times coalescent, 2-5 mm diam x 0.5-2 mm thick, or effused-pulvinate on decorticated wood, 15-60 mm long x 3-10 mm broad x 0.4-2 mm thick, with inconspicuous perithecial mounds; surface vinaceous purple to dark vinaceous or vinaceous brown, at times wrinkled between perithecial mounds; yellowish granules beneath surface with KOH-extractable pigments amber, luteous to citrine, olivaceous or dilute umber; the tissue below the perithecial layer brown to dark brown, 0.1-1.5 mm thick.
Perithecia spherical to obovoid, 200-380 Ám diam x 250-400(-600) Ám high.
Ostioles lower than the stromatal surface, at times, on mature stromata, surrounded by a ring of white substance 40-60 Ám diam.
Asci 105-170 Ám total length x 7-10 Ám broad, the spore bearing-parts 65-108 Ám long, the stipes 35-90 Ám long, with apical ring discoid, amyloid, 0.8-1.5 Ám high x 2.8-3.5 Ám broad.
Ascospores brown to dark brown, ellipsoid-inequilateral with narrowly rounded ends, 11-16 x 5-8 Ám ( M = 13.2 x 5.8 Ám), (on Carpinus betulus 9.5-12.2 x 4-6.2 Ám, M = 11.4 x 5.2 Ám), with slightly sigmoid to sigmoid spore-length germ slit; perispore dehiscent in 10% KOH, smooth; uniseriate to infrequently biseriate in the ascus.
Anamorph in nature buff to honey, velvety, occurring at first stages of stromatal development, more rarely on old stromata. Conidiogenous cells hyaline, smooth, 20-25 x 2-2.5 Ám. Conidia ellipsoid, hyaline, 3.5-5.5 x 2-3.5 Ám. The conidiogenous structure is Virgariella-like.
Habitat: on bark or decorticated wood of various trees, usually members of Betulaceae (Alnus, Betula, Carpinus and Corylus), very common on dead standing stems of Corylus avellana. Also recorded during this study on Acer campestre, Frangula alnus, Prunus spinosa, Rhamnus catharticus and Salix caprea.
Known distribution: reported from North temperate areas (Europe, North America) and from tropics as well (Guyana, Philippines, Taiwan) (Ju & Rogers, 1996).
I found this complete info HERE.
Hope you like!
1st.: F:9 - 1.6 sec. - Manual exposure - Tripod
2nd.: F:11 - 1.3 sec. - Manual exposure - Tripod
3rd.: F:18 - 1.8 sec. - Manual exposure - Tripod
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|Hi, please "idendify" these funghis, haha,|
they realy look like, what do you say?
Bye and greetings