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The crowded gills are adnexed and cream early, before darkening to a brownish colour with the developing spores. It has a small bulb at the base, and often does not grow straight. The thin stipe is 1–6 cm (0.39–2.36 in) high and 0.3–0.6 cm thick and lacks a ring. The cap is 1–4 cm (0.39–1.57 in) in diameter and white or cream-coloured with a silky texture, at first conical before flattening out to a more convex shape with a pronounced umbo (boss). lilacina came out as in a lineage with I. A 2005 study of nuclear genes found that I. It was classified as a separate species in 1918 by Calvin Henry Kauffman, who felt that it was consistently different and grew in different locales. It was given its current name by Claude Casimir Gillet in 1876. lilacinus by American mycologist Charles Horton Peck in 1872, who came across it in Bethlehem, New York. lilacina it was originally described as Agaricus geophyllus var. It was given its current binomial name in 1871 by Paul Kummer. Its specific epithet is derived from the Ancient Greek terms geo- "earth", and phyllon "leaf". Christiaan Hendrik Persoon spelt it Agaricus geophilus in his 1801 work Synopsis methodica fungorum. It was first described in 1799 as Agaricus geophyllus by English naturalist James Sowerby in his work Coloured Figures of English Fungi or Mushrooms. An all- lilac variety lilacina is also common. The fruiting body is a small all-white or cream mushroom with a fibrous silky umbonate cap and adnexed gills. It is widespread and common in Europe and North America, appearing under both conifer and deciduous trees in summer and autumn. Inocybe geophylla, commonly known as the earthy inocybe, common white inocybe or white fibercap, is a poisonous mushroom of the genus Inocybe.
