Agaricus moelleri

Agaricus moelleri

''Agaricus moelleri'', also known as the inky mushroom, or dark scaled mushroom, is a large mushroom of the genus ''Agaricus''. Most of the genus are excellent edibles, only a few are not, and this is one of the species that can leave some people with somewhat severe gastro-intestinal upsets. It appears occasionally in most kinds of woodland, during late summer, in northern temperate zones.
Dark Scaled Mushroom ☠ won't kill you... but you won't feel nice if you eat this.. Agaricus moelleri,Fall,Geotagged,United States

Appearance

The cap has a greyish-brown patch in the centre and cold grey-brown scaling on the surrounding off-white background. It is 5 to 9 centimetres in diameter, and yellows when bruised. It is ovate when young, flattening later. The stem has a drooping ring, and stains yellow very easily when bruised, this colour then changes to brown over time. The stem flesh bruises yellow only faintly, and is more noticeable in the base. The gills are crowded, and free, as is typical for an ''Agaricus''. They are pink on young specimens, but brown to black on older fruit bodies. The flesh is white and does not change colour on cutting. It is noted by some authors as smelling like ink, iodoform, sweat, or mouldy straw. The spores are 4–6 x 3–4 µm, and are elliptical.

A similar species occurring in North America, ''Agaricus praeclaresquamosus'' A.E. Freeman 1979, has several variants, some of which are larger.

The rare ''Agaricus phaeolepidotus'' also has the iodoform, or ink smell, but has browner cap scales, and stains yellow less readily.
Inky mushroom ☠ this one won't kill you - but you'll feel very bad if you eat it..  Agaricus moelleri,Fall,Geotagged,United States

Distribution

''Agaricus moelleri'' is found in the temperate zones of the northern hemisphere. North America, Britain, and Europe, growing in mixed forests and woods. It is widespread, but can be locally rare, and favors rich alkaline woodland, or parkland.
Inky mushroom not edible, despite it's looks...  Agaricus moelleri,Fall,Geotagged,United States

Habitat

''Agaricus moelleri'' is found in the temperate zones of the northern hemisphere. North America, Britain, and Europe, growing in mixed forests and woods. It is widespread, but can be locally rare, and favors rich alkaline woodland, or parkland.

References:

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Taxonomy
KingdomFungi
DivisionBasidiomycota
ClassAgaricomycetes
OrderAgaricales
FamilyAgaricaceae
GenusAgaricus
SpeciesA. moelleri