Bitter false funnelcap

''Leucopaxillus gentianeus'' is a bitter-tasting, inedible mushroom commonly known as the bitter false funnelcap, or the bitter brown leucopaxillus. A common synonym is ''Leucopaxillus amarus''. The bitter taste is caused by a triterpene called cucurbitacin B. The species was first described in 1873 as ''Clitocybe gentianea'' by French mycologist Lucien Quélet. František Kotlaba transferred it to ''Leucopaxillus'' in 1966.