Veronicastrum rubellum Veronica quinquefolia Veronicastrum album Veronica virginica Leptandra virginica Leptandra purpurea Leptandra oppositifolia Leptandra caerulea Paederota virginica Calistachya alba Callistachya virginica var. lanceolata Callistachya virginica var. purpurea Eustachya alba Eustachya purpurea Eustaxia alba Eustaxia japonica Eustaxia sibirica Veronicastrum virginicum f. villosa Veronicastrum virginicum f. virginicum Leptandra villosa Veronica virginica f. purpurea Veronicastrum virginicum f. roseum Veronicastrum virginicum f. purpureum Veronica virginica var. hirsuta Veronicastrum virginicum var. purpureum Leptandra virginica var. incarnata Veronica diversifolia Veronicastrum diversifolium Veronica purpurea Leptandra alba Callistachya virginica Eustaxia purpurea Eustachya villosa Veronicastrum virginicum var. lanceolatum Leptandra virginica var. purpurea
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024