Elm rasp
| Elm rasp | ||||||||||||
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Elm Rasling ( Hypsizygus ulmarius ) |
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| Scientific name | ||||||||||||
| Hypsizygus ulmarius | ||||||||||||
| ( Bull .: Fr. ) Redhead |
The elm or hardwood rasp ( Hypsizygus ulmarius , syn .: Lyophyllum ulmarium ) is a type of fungus from the rasp family .
features
Macroscopic features
The hat of the elm rasp is 5–15 cm wide, in exceptional cases it reaches a diameter of 25 cm. The surface is dry, has a silky structure and is ivory, pale gray or gray-ocher in color. The edge can be slightly ribbed. The whitish lamellas are crowded and bulged on the stem . The spore powder is white and the iodine color reaction is negative. The also whitish stem has a slightly fibrous structure. The firm white meat is tough in the handle. It tastes mild and smells floury-like cucumber.
Microscopic features
The rounded to broadly elliptical spores have a smooth surface. They have no germ pore and measure 5–7 × 4–5.5 micrometers.
Species delimitation
The species differs from the side lobes found in the same location in that the lamellae do not run down and the stem is arranged in the center. The raslings are ground-dwelling saprophytes and do not grow on wood.
Ecology and phenology
The relatively rare elm rasling grows parasitically on living or freshly felled deciduous trees, especially elms . It produces a white rot in the substrate . The tufted fruiting bodies often appear on living trunks at a height of several meters.
The species fructifies from October to November.
meaning
The elm rasp is edible . Since the occurrence has declined sharply in recent years, the species should be spared.
literature
- Ewald Gerhardt: BLV mushroom guide . 5th edition. BLV, Munich 2010, ISBN 978-3-8354-0644-5 , p. 104 .
