Bulbus fibra (Inocybe napipes)
- Division: Basidiomycota (Basidiomycetes)
- Subdivision: Agaricomycotina (Agaricomycetes)
- Classis: Agaricomycetes (Agaricomycetes)
- Subclass: Agaricomycetidae (Agaricomycetes)
- Ordo: Agaricales (Agaric vel Lamellar)
- Genus: Inocybaceae (Fibrosus)
- Genus: Inocybe (Fiber)
- Type: Inocybe napipes (cepa fibra)
habet; Umbro-brunneae, medio plerumque obscuriore, primo conice campanato, dein plano procumbente, in medio tuberculo notabili, in fungorum novellis nudis, postea leviter fibrosis et radiatim bifida, 30—60 mm diametro. bracteae primo albidae, dein albido-cinereae, maturae fuscae, 4—6 mm latae, frequentes, primo caule adhaerentes, postea fere liberae.
Crus: Cylindrica, supra leviter attenuata, tuberosa ad basin incrassata, solida, 50—80 mm alta et 4—8 mm crassa, fibrosa leviter longitudinaliter, pileo colorata, leviter levius.
pulpam: Cremor alba vel levis, in caule leviter brunnea (exceptis basi tuberosa). Gustus et odor sunt inenarrabiles.
Pulvis sporae: Levis silis fuscus.
Quaestiones: 9-10 x 5-6 µm, superficies ovata, irregulariter tuberosa (5-6 tubercula), pallide ovata.
incrementum, Crescit in solo ab Augusto ad nuper October in silvas deciduas. Corpora fructifera singillatim vel in parvis coetibus in locis uliginosis locis humidis apparent, plerumque sub betulis arboribus.
Utor: fungum malum.