https://fieldguide.mt.gov/speciesDetail.aspx?elcode=PDBRA22075
Woolly Twinpod - Montana Field Guide
Montana Field Guide contains a wealth of information about Montana's diverse species.
woollymontanafieldguide
https://idfg.idaho.gov/species/taxa/61456
Physaria oregona (Oregon Twinpod) | Idaho Fish and Game Species Catalog
idaho fish and gameoregonspeciescatalog