Mycena leptocephala (Pers.) Gillet
(Nitrous Bonnet)

Taxonomic hierarchy:
SpeciesMycena leptocephala (Nitrous Bonnet)
GenusMycena (a genus of bonnet toadstools)
FamilyMYCENACEAE (bonnet toadstools and their allies)
OrderAGARICALES (mushrooms and toadstools)
SubclassAGARICOMYCETIDAE (a subclass of basidiomycetes)
ClassAGARICOMYCETES (a class of fungi)
SubphylumAGARICOMYCOTINA (a subphylum of fungi)
PhylumBASIDIOMYCOTA (spore droppers, basidiomycetes)
KingdomFUNGI (true fungi)
DomainEukaryota (eukaryotes)
LifeBIOTA (living things)
Records of Mycena leptocephala (Nitrous Bonnet) :
1: Mycena leptocephala (Nitrous Bonnet)
21 Oct 2005 OSGR: SU56 51° 20’ N, 1° 20’ W Vice County: Berks (VC 22) England
in species-rich short grassland . Photos: toadstools, caulocystidia
Image 1: CollectionImage 2: Caulocystidia - magnifiedImage 3: Caulocystidia - magnified (2)Image 4: Caulocystidia - magnified (3)Image 5: Caulocystidia - magnified (4)Image 6: Caulocystidia - magnified (5)Image 7: Caulocystidia - magnified (6)
2: Mycena leptocephala (Nitrous Bonnet)
10 Oct 2004 OSGR: TQ96 51° 20’ N, 0° 50’ E Vice County: West Kent (VC 16) England
amongst grass
Image 1: Caps - in situ - close-upImage 2: CollectionImage 3: Side view - in situ - close-upImage 4: Caps - enlargedImage 5: Gills - enlargedImage 6: Gills - enlarged (2)Image 7: Caulocystidia - magnifiedImage 8: Caulocystidia - magnified (2)Image 9: Caulocystidia - magnified (3)Image 10: Caulocystidia - magnified (4)Image 11: Caulocystidia - magnified (5)Image 12: Cheilocystidia in gill edge - magnifiedImage 13: Cheilocystidia in gill edge - magnified (2)Image 14: Cheilocystidia in gill edge - magnified (3)Image 15: Gill edge with cheilocystidia - microscope low magnificationImage 16: Spores - magnifiedImage 17: Spores - highly magnifiedImage 18: Spores - highly magnified (2)
3: Mycena leptocephala (Nitrous Bonnet)
8 Oct 1998 OSGR: SU46 51° 20’ N, 1° 20’ W Vice County: Berks (VC 22) England
Image 1: CapImage 2: Cap (2)Image 3: Cap - LSImage 4: Cap - LS (2)Image 5: Cap - side viewImage 6: FruitbodiesImage 7: FruitbodyImage 8: Fruitbody - LSImage 9: GillsImage 10: Gills (2)Image 11: SporesImage 12: Spores (2)Image 13: Spores (3)
4: Mycena leptocephala (Nitrous Bonnet)
18 Oct 1978 OSGR: SU94 51° 10’ N, 0° 40’ W Vice County: Surrey (VC 17) England
in woodland clearing, in grass by young birch
Image 1: Cap - oblique view - in situImage 2: Fruitbody - oblique view - in situImage 3: Fruitbody - side view - lain downImage 4: Gills and stipe apex - close-upImage 5: Cap - top view - in situ - enlargedImage 6: Cheilocystidia - highly magnifiedImage 7: Spore - highly magnified
5: Mycena leptocephala (Nitrous Bonnet)
18 Oct 1978 OSGR: SU94 51° 10’ N, 0° 40’ W Vice County: Surrey (VC 17) England
in woodland clearing, in grass amid bramble and woodrush
Image 1: Fruitbodies - side view - in situImage 2: Fruitbody - side view - in situImage 3: Fruitbody - side view showing gills and stipe - lain downImage 4: Gills and stipe apex - close-upImage 5: Cheilocystidia - highly magnifiedImage 6: Spore - highly magnified

Mycena leptocephala (Nitrous Bonnet) may be included in identification literature listed under the following higher taxa:

NBNNBN (data.nbn.org.uk) has a distribution map for Mycena leptocephala (Nitrous Bonnet)
BioInfoBioInfo (www.bioinfo.org.uk) has 5 host/parasite/foodplant and/or other relationships for Mycena leptocephala (Nitrous Bonnet)

A common, small toadstool with a grey pellucid-striate cap and a distinct ’alkaline’ smell (like crushed poppy petals or pea pods). It is mainly a woodland species although sometimes also found in grassland where it is much confused with M. aetites. However, as well as microscopic differences, the latter has a slightly different smell (more like dirty ashtrays)

1900

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