Tricholoma pessundatum

First described as Agaricus pessundatus by Elias Magnus Fries in 1821, it was transferred to the genus Tricholoma by Lucien Quélet in 1872.

The orangish cap is up to {{Convert|18|cm|frac=4}} across, with a lighter margin, and is viscid when wet. The gills are white but develop stains and vary in attachment. The stem is up to {{Convert|14|cm|abbr=on|frac=4}} long. The spore print is white.{{Cite book |last=Arora |first=David |author-link=David Arora |url=https://archive.org/details/arora-david-mushrooms-demystified-a-comprehensive-guide-to-the-fleshy-fungi-ten-speed-press-1986/page/185/mode/2up |title=Mushrooms Demystified: A Comprehensive Guide to the Fleshy Fungi |date=1986 |publisher=Ten Speed Press |isbn=978-0-89815-170-1 |edition=2nd |location=Berkeley, CA |pages=185 |orig-date=1979}}

It has a sour meal odor.{{cite book |last=Miller Jr. |first=Orson K. |title=North American Mushrooms: A Field Guide to Edible and Inedible Fungi |last2=Miller |first2=Hope H. |publisher=FalconGuide |year=2006 |isbn=978-0-7627-3109-1 |location=Guilford, CN |pages=127}}

A very similar species to the European mushroom is Tricholoma muricatum, which differs only in microscopic details.{{cite book|last1=Trudell|first1=Steve|url=https://books.google.com/books?id=WevHvt6Tr8kC|title=Mushrooms of the Pacific Northwest|last2=Ammirati|first2=Joe|publisher=Timber Press|year=2009|isbn=978-0-88192-935-5|series=Timber Press Field Guides|location=Portland, OR|pages=105}}

It contains toxins which can cause severe gastrointestinal upset.

• List of North American Tricholoma
• List of Tricholoma species

{{Mycomorphbox

| name = {{PAGENAME}}{{italic title}}

| hymeniumType = gills

| capShape = convex

| whichGills = adnexed

| stipeCharacter = bare

| sporePrintColor = white

| ecologicalType = mycorrhizal

| whichGills2 = free

| howEdible = poisonous

| howEdible2 = allergenic

}}{{Reflist|refs=

{{cite journal |author=Quélet L. |title=Les Champignons du Jura et des Vosges |journal=Mémoires de la Société d'Émulation de Montbéliard |year=1872 |volume=5 |issue=2 |pages=43–332 (see p. 77) |language=fr}}

{{cite web |title=Tricholoma pessundatum (Fr.) Quél. :77, t. 95, 1872 |url=http://www.mycobank.org/BioloMICS.aspx?Table=Mycobank&Rec=123104&Fields=All |publisher=MycoBank. International Mycological Association |access-date=2013-03-23}}

}}

{{Taxonbar|from=Q5398217}}

pessundatum

Category:Fungi described in 1821

Category:Fungi of North America

Category:Poisonous fungi

Category:Taxa named by Elias Magnus Fries

Category:Fungus species

{{Tricholomataceae-stub}}