King Oyster Mushroom

Also known as King Trumpet Mushroom, French Horn Mushroom, Trumpet Royale, Steppe Fan

King trumpet mushrooms grow as weak parasites or saprotrophs on the roots of herbaceous plants in the carrot family, particularly sea hollies. Unlike many other oyster species, they produce a thick, solid stem topped with a relatively small, pale brown cap that remains firm throughout maturity. Found in open pastures, grasslands, and coastal dunes across southern Europe, North Africa, and Central Asia, they play an active role in recycling organic matter in arid soils.