The species is known from only 25 locations in Canada, and is considered threatened.

It is only known from two locations in central Switzerland, where it is endemic.

It is only known from two locations in Kenya.

It is known from six to seven locations in Norway and two in Sweden.

It has been classified as a Vulnerable species based on the fact that it is known from only three locations.

The plant is currently known from 21 locations in seven metapopulations.

Fossils of fruits, pollen, seeds, and leaves are known from several dozen locations.

It is known from two locations in Idaho, as well.

The plant is known from only two locations, each containing a scattering of occurrences.

It is only known from two widely separated locations in Wyoming and New Mexico.