How to identify it?
Cap
Cap 1-4 cm across, conical at first, expanding with age and usually umbonate; whitish, pale lilac, becoming ocher or tan at the center; surface smooth or finely fibrous. Flesh insubstantial, whitish to lilac. Taste mild.
Gills
Gills adnexed, pale lilac, becoming grayish brown, close.

Scientific Classification

Phylum
Club fungi Class
Mushroom-forming fungi Order
Gilled fungi Family
Inocybaceae Genus
Fiber caps Species
White fibercap