Heart-leaved Bittercress, Large Mountain Bittercress, Lyall's Bittercress: Cardamine cordifolia var. lyallii (Synonym: Cardamine lyallii) -
Nuttall's Toothwort, Oak Toothwort, Slender Toothwort, Spring Beauty: Cardamine nuttallii var. nuttallii (Synonyms: Cardamine nuttallii var. covilleana, Cardamine nuttallii var. dissecta, Cardamine pulcherrima, Cardamine pulcherrima var. pulcherrima, Cardamine pulcherrima var. tenella, Dentaria tenella, Dentaria tenella var. pulcherrima, Dentaria tenella var. quercetorum, Dentaria tenella var. tenella) -
Little Western Bittercress, Few-seeded Bittercress, Siberian Bittercress, Slender Toothwort, Spring Beauty, Umbellate Bittercress: Cardamine oligosperma (Synonyms: Cardamine oligosperma var. kamtschatica, Cardamine umbellata) -
Pennsylvania Bittercress, Quaker Bittercress: Cardamine pennsylvanica (Synonyms: Cardamine flexuosa ssp. pensylvanica, Cardamine hirsuta var. pensylvanica, Cardamine pennsylvanica, Cardamine pensylvanica var. brittoniana) -