Rigidoporus ulmarius
species of fungus
Rigidoporus ulmarius is a fungal plant pathogen found mainly on broad-leaved trees. Elm is considered particularly susceptible.
The fruiting bodies are white, knobbly and relatively hard, requiring a fair amount of force to break. Older bodies may be covered with green algae, or partially covered with vegetation and leaves making them difficult to spot. They often encapsulate grass, twigs and other debris.
Tubes are 1–5 mm long in each layer, pinkish to orange when young, browning with age, each layer separated by a thin contrasting band of white flesh. Pores 5–8 per millimeter, red-orange fading to clay-pink or buff with age. Spores pale yellow, globose, 6–7.5 μm in diameter. Hyphal structure monomitic; generative hyphae lacking clamps. Habitat at the base of trunks of deciduous trees, usually elm.
The public source identifies “Rigidoporus ulmarius” as species of fungus. This brief keeps that definition visible, then builds a research path around Rigidoporus, ulmarius and species.
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Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated May 19, 2024. The linked authority identifier is Q1311011. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Rigidoporus ulmarius” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.