''Inocybe rimosa'' (formerly known as ''Inocybe fastigiata''), commonly known as straw-colored fiber head, is a poisonous mushroom native to Europe. Its toxic ingredient is muscarine, discovered during the 1930s. Serious poisoning can result from consuming any quantity of the mushroom. German naturalist Jacob Christian Schäffer described this species in 1774. Lucien Quélet transferred it to the genus '' Inocybe'' in 1872. The tan (or rarely whitish) cap is cone-shaped then expands, generally retaining an umbo and a darker center. Its surface is fibrous. The gills are light grayish and brown with age. The stalk is whitish, semi-fibrillose, and slightly clavate. The odour tends to be spermatic. In Israel, the species grows under Palestine oak ('' Quercus calliprinos'') and pines, with mushrooms still appearing in periods of little or no rain as they are mycorrhizal. In Israel, it is confused with edible mushrooms of the genus '' Tricholoma'', particularly ''

Tricholoma terreum ''Tricholoma terreum'', commonly known as the grey knight or dirty tricholoma, is a grey-capped mushroom of the large genus ''Tricholoma''. It is found in coniferous woodlands in Europe, and has also been encountered under introduced pine trees ...

'', and ''

Suillus granulatus ''Suillus granulatus'' is a pored mushroom of the genus ''Suillus'' in the family Suillaceae. It is similar to the related '' S. luteus'', but can be distinguished by its ringless stalk. Like ''S. luteus'', it is an edible mushroom ...

'', all of which grow in similar habitats. ''I. sororia'' is another similar species.

References

{{Taxonbar, from=Q1737818 rimosa Poisonous fungi Fungi described in 1774 Fungi of Europe Taxa named by Jean Baptiste François Pierre Bulliard