Helicobasidium compactum

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Helicobasidium compactum
Systematics
Class : Agaricomycetes
Subclass : insecure position (incertae sedis)
Order : Ear lobe fungi (Auriculariales)
Family : Ear flap relatives (Auriculariaceae)
Genre : Snail basidia ( Helicobasidium )
Type : Helicobasidium compactum
Scientific name
Helicobasidium compactum
( Boedijn ) Boedijn

Helicobasidium compactum is a species of fungus from the family in the class of the ear lobe relatives (Auriculariaceae) of the Tremellomycetes . It is common throughout the tropics and Europe. The fungus grows parasitically on trunks, roots and bark of trees, shrubs and herbaceous plants , especially near the ground.

features

Macroscopic features

The fruiting body of Helicobasidium compactum appears as a velvety felt carpet on the surface of its host. The fruit bodies are purple, velvety-tomentose and resupinate . Its texture is reminiscent of rotting fabric. The hymenium is purple in color. Pink rhizomorphs often form on its edge , which frame it. The fruit layer can often cover the entire surface of the host.

Microscopic features

The hyphae of Helicobasidium compactum are cylindrical and do not have buckles . Two to four-cell protobasidia form at their ends. The basidia are slightly inflected. The thin-walled, smooth and inamyloid spores of Helicobasidium compactum are narrow ellipsoid and reach a size of 12–23.5 × 3.5–6  µm . The hyphae of the subcuticle are strong purple-brown.

ecology

Helicobasidium compactum grows saprobionic and parasitic on flowering plants, especially on the stumps, roots and bark of trees, shrubs and herbs. A wide range of host plants are used in the tropics, such as coffee and tea bushes . In Europe the species was found on lumps of mortar , ash ( Fraxinus spp.), Hawthorn ( Crataegus spp.) And blackthorn ( Prunus spinosa ).

distribution

Helicobasidium compactum was first discovered in the tropics of Africa , Asia and America . The species was first found in Great Britain in the 1970s, and later also in Germany and Switzerland .

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