Bristly Mousetail, Mountain Mousetail, Sedge Mousetail: Myosurus apetalus var. montanus (Synonyms: Myosurus aristatus ssp. montanus, Myosurus minimus ssp. montanus) -
Least Mousetail, Tiny Mousetail: Myosurus minimus (Synonyms: Myosurus lepturus, Myosurus lepturus var. filiformis, Myosurus minimus ssp. major, Myosurus minimus var. filiformis, Myosurus minimus var. major) -