Bristly Moustail, Bristly Mouse-tail, Sedge Mousetail, Sedge Mouse-tail: Myosurus apetalus var. borealis (Synonyms: Myosurus aristatus, Myosurus aristatus var. borealis, Myosurus minimus var. aristatus)
Vernal Pool Mousetail: Myosurus xalopecuroides (Synonyms: Myosurus alopecuruoides, Myosurus minimus ssp. apus, Myosurus xclavicaulis, Myosurus minimus var. clavicaulis, Myosurus minimus var. sessiliflorus, Myosurus minimus x sessilis) -
Least Mousetail, Least Mouse-tail, Small Mousetail, Tiny Mousetail, Tiny Mouse-tail, Common Mouse-tail: Myosurus minimus (Synonyms: Myosurus clavicaulis, Myosurus lepturus, Myosurus lepturus var. filiformus, Myosurus minimus ssp. apus, Myosurus minimus ssp. major, Myosurus minimus ssp minimus, Myosurus minimus var. apus, Myosurus minimus var. clavicaulis, Myosurus minimus var. filiformus, Myosurus minimus var. interior, Myosurus minimus var. lepturus, Myosurus minimus var. major) -
Sessile Mousetail, Short-stemmed Mousetail: Myosaurus sessilis (Synonym: Myosaurus minimus ssp. apus) -