Psathyrella microrhiza (Lasch) Konrad & Maubl.
(Rootlet Brittlestem)

Taxonomic hierarchy:
SpeciesPsathyrella microrhiza (Rootlet Brittlestem)
GenusPsathyrella (brittlestem toadstools)
FamilyPSATHYRELLACEAE (a family of inkcap and brittlestem toadstools)
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 Psathyrella microrhiza (Rootlet Brittlestem) :
1: Psathyrella microrhiza (Rootlet Brittlestem)
19 Sep 1983 OSGR: SU26 51° 20’ N, 1° 40’ W Vice County: North Wilts (VC 7) England
Image 1: CollectionImage 2: Fruitbodies - side view - in situImage 3: Fruitbodies - side view - in situ (2)Image 4: Fruitbodies - side view - in situ (3)Image 5: Fruitbodies - side view - in situ (4)Image 6: Gills and stipe apex - close-up - enlargedImage 7: Cheilocystidia - magnifiedImage 8: Pleurocystidia - magnifiedImage 9: Spores - highly magnifiedImage 10: DescriptionImage 11: Description - contd
2: Psathyrella microrhiza (Rootlet Brittlestem)
30 Oct 1981 OSGR: SU26 51° 20’ N, 1° 40’ W Vice County: North Wilts (VC 7) England
Image 1: CollectionImage 2: Fruitbodies - side view - in situImage 3: Fruitbodies - side view - in situ (2)Image 4: Fruitbodies - side view showing gills and stipe - in situImage 5: Fruitbody - side view showing gills and stipe - lain downImage 6: Gills and stipe apex - close-up - enlargedImage 7: Basidium - magnifiedImage 8: Cheilocystidia - magnifiedImage 9: Pleurocystidia - magnifiedImage 10: Spores - highly magnifiedImage 11: DescriptionImage 12: Description - contd
3: Psathyrella microrhiza (Rootlet Brittlestem) IDENTIFICATION UNCERTAIN
17 Oct 1979 OSGR: SU83 51° 10’ N, 0° 50’ W Vice County: North Hants (VC 12) England
in horse-grazed pasture
Image 1: CollectionImage 2: Fruitbodies - oblique view - in situImage 3: Fruitbody - side view - in situImage 4: Cap - section - close-up - enlargedImage 5: Cap - side view - close-up - enlargedImage 6: Gills and stipe apex - close-up - enlargedImage 7: Cap cuticle - TS - magnifiedImage 8: Cheilocystidia - highly magnifiedImage 9: Pleurocystidia - highly magnifiedImage 10: Spores - magnifiedImage 11: Spores - highly magnifiedImage 12: Description

Psathyrella microrhiza (Rootlet Brittlestem) may be included in identification literature listed under the following higher taxa:

NBNNBN (data.nbn.org.uk) has a distribution map for Psathyrella microrhiza (Rootlet Brittlestem)
BioInfoBioInfo (www.bioinfo.org.uk) has 2 host/parasite/foodplant and/or other relationships for Psathyrella microrhiza (Rootlet Brittlestem)

A very common and widespread species which grows on soil, buried woody debris, sawdust etc. It is a common member of the fungal community of flowerbeds mulched with wood chip or shredded bark.

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