An uncommon and easily recognizable member of the genus Leucoagaricus, at least here in the Netherlands that is. Mainly found in the coastal region on the west and some records from the northern isles, with a single observation inlands. Found them quite en masse on the roadside across the street where I live! Always fun to have such a rarity growing so close. Listed as Vulnerable on our national Red List (Arnolds & Veerkamp, 2008).