The hymenium is the tissue layer on the hymenophore of a fungal fruiting body where the cells develop into basidia or asci, which produce spores. In some species all of the cells of the hymenium develop into basidia or asci, while in others some cells develop into sterile cells called cystidia (basidiomycetes) or paraphyses (ascomycetes). Cystidia are often important for microscopic identification. The subhymenium consists of the supportive hyphae from which the cells of the hymenium grow, beneath which is the hymenophoral trama, the hyphae that make up the mass of the hymenophore.
The Fomitopsidaceae are a family of fungi in the order Polyporales. Most species are parasitic on woody plants, and tend to cause brown rots. The name comes from Fomitopsis + -aceae.
Postia is a genus of brown rot fungi in the family Fomitopsidaceae.
Antrodiella is a genus of fungi in the family Steccherinaceae of the order Polyporales.
Mycena leptocephala, commonly known as the nitrous bonnet, is a species of fungus in the family Mycenaceae. The mushrooms have conical grayish caps that reach up to 3 cm (1.2 in) in diameter, and thin fragile stems up to 5 cm (2.0 in) long. The gills are gray and distantly spaced. The spores are elliptical, typically measure 7–10 by 4–6 μm, and are white in deposit. When viewed under a light microscope, the gills have abundant spindle-shaped cystidia on the gill edges, but few on the gill faces. The mushroom is found in North America, Asia, and Europe where it grows singly or in groups on conifer needles, cones and sticks on the forest floor. It has a distinctive odor of bleach; the edibility is unknown. Similar species include Mycena alcalina, M. austera, and M. brevipes.
Mycena sanguinolenta, commonly known as the bleeding bonnet, the smaller bleeding Mycena, or the terrestrial bleeding Mycena, is a species of mushroom in the family Mycenaceae. It is a common and widely distributed species, and has been found in North America, Europe, Australia, and Asia. The fungus produces reddish-brown to reddish-purple fruit bodies with conic to bell-shaped caps up to 1.5 cm (0.6 in) wide held by slender stipes up to 6 cm (2.4 in) high. When fresh, the fruit bodies will "bleed" a dark reddish-purple sap. The similar Mycena haematopus is larger, and grows on decaying wood, usually in clumps. M. sanguinolenta contains alkaloid pigments that are unique to the species, may produce an antifungal compound, and is bioluminescent. The edibility of the mushroom has not been determined.
Skeletocutis is a genus of about 40 species of poroid fungi in the family Polyporaceae. The genus has a cosmopolitan distribution, although most species are found in the Northern Hemisphere. It causes a white rot in a diverse array of woody substrates, and the fruit bodies grow as a crust on the surface of the decaying wood. Sometimes the edges of the crust are turned outward to form rudimentary bracket-like caps.
Mycena aurantiomarginata, commonly known as the golden-edge bonnet, is a species of agaric fungus in the family Mycenaceae. First formally described in 1803, it was given its current name in 1872. Widely distributed, it is common in Europe and North America, and has also been collected in North Africa, Central America, and Japan. The fungus is saprobic, and produces fruit bodies (mushrooms) that grow on the floor of coniferous forests. The mushrooms have a bell-shaped to conical cap up to 2 cm in diameter, set atop a slender stipe up to 6 cm long with yellow to orange hairs at the base. The fungus is named after its characteristic bright orange gill edges. A microscopic characteristic is the club-shaped cystidia that are covered with numerous spiky projections, resembling a mace. The edibility of the mushroom has not been determined. M. aurantiomarginata can be distinguished from similar Mycena species by differences in size, color, and substrate. A 2010 publication reported the discovery and characterization of a novel pigment named mycenaaurin A, isolated from the mushroom. The pigment is responsible for its color, and it has antibiotic activity that may function to prevent certain bacteria from growing on the mushroom.
Phellinus ellipsoideus is a species of polypore fungus in the family Hymenochaetaceae, a specimen of which produced the largest fungal fruit body ever recorded. Found in China, the fruit bodies produced by the species are brown, woody basidiocarps that grow on dead wood, where the fungus feeds as a saprotroph. The basidiocarps are perennial, allowing them to grow very large under favourable circumstances. They are resupinate, measuring 30 centimetres (12 in) or more in length, though typically extending less than a centimetre from the surface of the wood. P. ellipsoideus produces distinct ellipsoidal spores, after which it is named, and unusual setae. These two features allow it to be readily differentiated microscopically from other, similar species. Chemical compounds isolated from the species include several steroidal compounds. These may have pharmacological applications, but further research is needed.
Sarcomyxa serotina is a species of fungus in the family Sarcomyxaceae. Its recommended English name in the UK is olive oysterling. In North America it is known as late fall oyster or late oyster mushroom. Fruit bodies grow as greenish, overlapping fan- or oyster-shaped caps on the wood of both coniferous and deciduous trees. The gills on the underside are closely spaced, bright orange yellow, and have an adnate attachment to the stipe. It produces a yellow spore print; spores are smooth, amyloid, and measure 4–6 by 1–2 µm.
Wolfiporia curvispora is a species of fungus in the order Polyporales. It is found in Jilin, China, where it grows on the rotting wood of Pinus koraiensis. The fungus was described as new to science in 1998 by mycologist Yu-Cheng Dai. The fruitbodies of the fungus are resupinate, meaning they lie flat on the substrate, and have dimensions of up to 3 metres (10 ft) long by 70 cm (28 in) wide by 1 centimetre (0.4 in) thick. They are creamy white, soft, and light. The hyphal system is dimitic, comprising generative and skeletal hyphae. The specific epithet curvispora refers to the curved spores.
In Finland, Kotiranta and Niemelä introduced a widely used method for comparing the conservation values of different forest areas, based on the observation that certain wood-rotting fungi are very sensitive to the impact of human activities on forest ecosystems. Such species are slow to return to areas from where they have disappeared, so their presence is evidence of a long continuity in forest ecosystems.
Rhodonia is a fungal genus in the family Fomitopsidaceae. It is a monotypic genus, containing the single crust fungus Rhodonia placenta. A brown rot species, R. placenta is found in China, Europe, and North America, where it grows on decaying conifer wood.
Skeletocutis subvulgaris is a species of poroid, white rot fungus in the family Polyporaceae. Found in China, it was described as a new species in 1998 by mycologist Yu-Chen Dai. It was named for its resemblance to Skeletocutis vulgaris. The type collection was made in Hongqi District, Jilin Province, where it was found growing on the rotting wood of Korean pine.
Postia cylindrica is a species of poroid fungus in the family Fomitopsidaceae. Found in Southern China, it was described as a new species in 2017 by Hai-Sheng Yuan. The type collection was found growing on a dead pine tree in Jiangxi. The fungus is characterized macroscopically by crust-like to effused-reflexed fruit bodies with a cream to buff coloured cap surface and a reddish-brown margin that curves inward. There are gloeoplerous (oily) hyphal cells in the cuticular layer, and an absence of cystidia in the hymenium. The fungus produces smooth, cylindrical, thin-walled spores measuring 4.7–5.2 by 1.3–1.5 μm.
Postia duplicata is a species of poroid fungus in the family Fomitopsidaceae that was described as a new species in 2014. It is found in Yunnan and Zhejiang provinces of China, where it causes a brown rot on angiosperm wood. The fungus is named (duplicata) for its characteristic two-layered context, a feature that distinguishes it from other Postia species. The spores made by this fungus are cylindrical, hyaline, smooth, and typically measure 3.8–5.8 by 1.8–2.5 µm.
Amylocystis lapponica is a species of bracket fungus in the family Fomitopsidaceae, and the type species of genus Amylocystis. It produces medium-sized, annual fruit bodies that are soft, and have a strong, distinct smell. The fungus is a saprophyte that feeds on coniferous wood of logs lying on the ground, and causes brown rot. It is a rather rare species that only occurs in old-growth forest.
Diplomitoporus flavescens is a species of poroid crust fungus in the family Polyporaceae.
Phellinidium ferrugineofuscum is a species of fungus belonging to the family Hymenochaetaceae. It has been found growing on Abies sibirica.
Postia lateritia is a species of fungus belonging to the family Fomitopsidaceae.
