About Leucopaxillus gentianeus (Quél.) Kotl.
Leucopaxillus gentianeus (Quél.) Kotl. is a bitter-tasting, inedible mushroom, commonly known as the bitter false funnelcap or the bitter brown leucopaxillus. A common synonym for this species is Leucopaxillus amarus. It was first described in 1873 as Clitocybe gentianea by French mycologist Lucien Quélet, and František Kotlaba transferred it to the Leucopaxillus genus in 1966. The cap (pileus) of the mushroom ranges from 4 to 12 centimetres (1.6 to 4.7 inches) wide, while the stem (stipe) ranges from 4 to 6 centimetres (1.6 to 2.4 inches) long. It has a mild to pungent smell and a bitter taste, which makes it inedible. The bitter taste comes from a triterpene called cucurbitacin B, and it produces a white spore print. This species can resemble two other mushroom species: Leucopaxillus tricolor and Russula compacta.