page_title: Cortinarius cinnamomeus
section_title: Distribution and habitat
hierarchical_section_title: Cortinarius cinnamomeus / Distribution and habitat
caption_attribution_description: Blaugrüne Segge Carex flacca, Gliensee, Mecklenburg-Vorpommern
context_page_description: Cortinarius cinnamomeus, also known as the cinnamon webcap, is a basidiomycete mushroom of the genus Cortinarius. The fungus produces brown fruit bodies with caps up to 6 cm wide and stems up to 12 cm long. The closely crowded gills underside the cap are initially yellow before turning brown. Cortinarius cinnamomeus is common in damp places in coniferous forests. It is distributed throughout the temperate zone of the Northern Hemisphere.
context_section_description: The fruit bodies of Cortinarius cinnamomeus are common in damp places in coniferous forests, growing not only in Europe but apparently throughout the temperate zone of the northern hemisphere. It has also been collected from Yunnan Province, China.
  Cortinarius cinnamomeus colonizes the root systems of the sedges Carex flacca and Carex pilulifera, forming ectomycorrhizal-like structures lacking a Hartig net—a network of hyphae that penetrate between the epidermal and cortical cells of the root. The structures formed between C. cinnamomeus and the sedges possess a distinct fungal mantle (85–100 μm thick), hyphal infection in epidermal cells, rhizomorphs and extramatrical hyphae. These ectomycorrhiza-like structures are formed on first-order lateral roots but are morphologically and anatomically distinct from dauciform roots (short swollen hairy lateral roots).
caption: The fungus forms ectomycorrhiza-like structures with the sedge Carex flacca.
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