The plant is known only from the type collection made in 1898, and may be extinct.

The publication of the species was based on a type collection by Copland.

Described as new to science in 2012, it is named after John W. Allen, who provided the type collection.

The type collection was collected on the ground, in a forest area.

The type collections serve as a primary comparative resource for museum scientists, graduate students, and visiting researchers.

This taxon has not been reported until 2005 after the type collection.

Dahl remained in Berlin until he retired and his type collection is held in this museum.

Cortinarius sinapivelus is known only from the type collection.

Some type collections can be viewed online at the websites of the herbaria in question.

It is known only from the type collection, which was made in a narrow canyon on Amurí-tepui.