Hedysarum mackenziei Richardson, Bot. Hedysarum americanum var. Hedysarum boreale subsp. Hedysarum boreale var. Isotype NY Columbia.
Roots are thick and fibrous.
Wing auricles free from each other, blunt, shorter than the claw. Stigmas per style 1. Loment margins wingless. Ecology and habitat. Taxon as an environmental indicator.