Extract from Wikipedia article: Stropharia hornemannii is a species of agaric fungus in the family Strophariaceae. It is found in Europe and North America, where it grows as a saprophyte on rotting conifer wood. The specific epithet hornemannii honors Danish botanist Jens Wilken Hornemann, who made the first scientifically documented collections of the species. Common names for the mushroom include luxuriant ringstalk and lacerated stropharia.
Luxuriant ringstalk mushrooms (Stropharia hornemannii) near Kavgolovskoe Lake. North from Saint Petersburg, Russia, September 21, 2016 Novyy per., Kavgolovo, Leningradskaya oblast', Russia, 188667
Luxuriant ringstalk mushrooms (Stropharia hornemannii) near Lisiy Nos, west from Saint Petersburg. Russia, October 19, 2016 Primorskoye sh., g. Sankt-Peterburg, Russia, 197755
Conifer roundhead mushrooms (Stropharia hornemannii) at the base of a tree in Posiolok near Vyritsa, 50 miles south from Saint Petersburg. Russia, September 29, 2017 Unnamed Road, Vyritsa, Leningradskaya oblast', Russia, 188381
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