Wikipedia:Today's featured article/August 10, 2015

Entoloma sinuatum is a poisonous mushroom found across Europe and North America. It is the largest mushroom of the Entoloma genus of pink-spored fungi. Appearing in late summer and autumn, it is found in or near deciduous woodlands on clay or chalky soils, sometimes in the form of fairy rings. The ivory to light grey-brown cap is up to 20 cm (8 in) across with a margin that is rolled inward. The sinuate gills are pale and often yellowish, becoming pink as the spores develop. The thick whitish stem has no ring. When young, it may be mistaken for the edible St George's mushroom (Calocybe gambosa) or the miller mushroom (Clitopilus prunulus). It has been responsible for many cases of mushroom poisoning in Europe, causing primarily gastrointestinal problems that have been described as highly unpleasant. Delirium and depression are uncommon chronic side effects. It is generally not considered to be lethal, although one source has reported deaths from its consumption.