sentences:  At one point, the Polish ate the fool's webcap, "Cortinarius orellanus", until people began to get poisoned from eating the mushroom.It is now known that several "Cortinarius" species contain a deadly toxin, orellanine, which causes kidney failure.Most "Cortinarius" are either too small or unpleasant-tasting to eat, but some, such as the gypsy mushroom ("Cortinarius caperatus") and the large and tasty "Cortinarius praestans", are highly esteemed.