Athelia laxa
| Athelia laxa | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Athelia laxa | ||||||||||||
| ( Burt ) Jülich |
Athelia laxa is a stand mushroom art from the family of the tissue skin relatives (Atheliaceae). It forms resupinate, white and moldy carpet-like fruiting bodies on Canadian hemlocks . The known distribution of the species includesa nearctic areawith Canada and the United States .
features
Macroscopic features
Athelia laxa forms, like all species from the genus of the tissue skin ( Athelia ), cream-colored, thin fruiting bodies with smooth hymenium and fibrous to rhizomorphic margins. They are resupinate, that is, they lie directly on the substrate, and can easily be removed from it.
Microscopic features
Athelia laxa has a monomitic hyphae structure that is typical of tissue membranes , that is, it only has generative hyphae that serve the growth of the fruiting body. The hyphae are hyaline to light yellowish and thin-walled. They always have buckles and are 2–2.5 µm wide. Usually the hyphae branch at an oblique angle and are interspersed with crystalline structures. Unlike most of the others of the genus, the species has 40–50 × 6–7 µm cystidas with a 7–8 µm head and a buckle at the base; they are thin-walled, hyaline and not encrusted. The basidia of the species are hyaline, broad ellipsoid to club-shaped to stalked and 18–33 × 6.5–8.5 µm in size. They have a buckle at the base, they have four, rarely only two sterigmata . The spores of the fungus are spherical in shape, 6–6.5 × 6–6.5 µm in size, smooth and thin to slightly thick-walled and hyaline.
distribution
The known distribution of Athelia laxa includes eastern Canada and the eastern United States .
ecology
Athelia laxa is a saprobiont from the Canadian hemlock ( Tsuga canadensis ), which may attack other hemlocks as well . The fruiting bodies can be found both on the bark and on the wood of the plants.
literature
- Walter Jülich: Monograph of the Athelieae (Corticiaceae, Basidiomycetes). In: Wildenowia Beiheft 7, 1972. pp. 1–283.