Extract from Wikipedia article: Grifola frondosa is a polypore mushroom that grows in clusters at the base of trees, particularly oaks. The mushroom is commonly known among English speakers as hen of the woods, hen-of-the-woods, ram's head and sheep's head. It is typically found in late summer to early autumn. In the United States' supplement market, as well as in Asian grocery stores, the mushroom is known by its Japanese name maitake (舞茸, "dancing mushroom"). Throughout Italian American communities in the northeastern United States, it is commonly known as the signorina mushroom. G. frondosa should not be confused with Laetiporus sulphureus, another edible bracket fungus that is commonly called chicken of the woods or "sulphur shelf". Like all polypores, the fungus becomes inedible when older, because it is then too tough to eat.
Hen-of-the-woods polypore mushroom (Grifola frondosa) on display on mushroom exhibition in Botanic Institute. Saint Petersburg, Russia, September 20, 2013
Hen-of-the-wood fungus (Grifola frondosa polypore mushroom) on mushroom show in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, October 1, 2016 Aptekarskiy pr., 3, Sankt-Peterburg, Russia, 197022
Hen-of-the-wood fungus (polypore mushroom Grifola frondosa) near a base of a large oak tree in Dubki Park in Sestroretsk, west from Saint Petersburg. Russia, October 2, 2016 Dubkovskoye sh., 42, Sestroretsk, g. Sankt-Peterburg, Russia, 197706
Hen-of-the-wood fungus (polypore mushroom Grifola frondosa) on a root of oak tree in Dubki Park in Sestroretsk, west from Saint Petersburg. Russia, October 2, 2016 Dubkovskoye sh., 42, Sestroretsk, g. Sankt-Peterburg, Russia, 197706
Large hen-of-the-wood fungus (polypore mushroom Grifola frondosa) in Dubki Park in Sestroretsk, west from Saint Petersburg. Russia, October 2, 2016 Dubkovskoye sh., 42, Sestroretsk, g. Sankt-Peterburg, Russia, 197706
Hen-of-the-wood fungus (polypore mushroom Grifola frondosa) near an old oak in Dubki Park in Sestroretsk, west from Saint Petersburg. Russia, October 2, 2016 Dubkovskoye sh., 42, Sestroretsk, g. Sankt-Peterburg, Russia, 197706
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Search of mushroom species for given keywords "Grifola frondosa" was done through
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Selection of a particular species from the list of 5 species was performed automatically.