Alpine Willowherb, Alpine Willow-herb, Pimpernel Willowherb: Epilobium anagallidifolium (Synonyms: Epilobium alpinum, Epilobium anagallidifolium var. pseudoscaposum)
Ciliate Willowherb, Common Willowherb, Purple-leaved Willowherb: Epilobium ciliatum ssp. ciliatum (Synonyms: Epilobium adenocaulon, Epilobium adenocaulon var. ecomosum, Epilobium adenocaulon var. holosericeum, Epilobium adenocaulon var. parishii, Epilobium adenocaulon var. perpexans, Epilobium americanum, Epilobium brevistylum, Epilobium brevistylum var. ursinum, Epilocium californicum, Epilobium californicum var. holosericeum, Epilobium ciliatum var. ecomosum, Epilobium delicatum, Epilobium ecomosum, Epilobium glandulosum var. adenocaulon, Epilobium glandulosum var. ecomosum, Epilobium glandulosum var. macounii, Epilobium leptocarpum var. macounii, Epilobium ursinum, Epilobium watsonii var. parishii)
Dahurian Willowherb: Epilobium davuricum (Synonym: Epilobium palustre var. davuricum)
Hornemann's Willowherb: Epilobium hornemannii (ssp. ?)
Milkflower Willowherb: Epilobium lactiflorum (Synonyms: Epilobium alpinum var. lactiflorum, Epilobium hornemannii var. lactiflorum)
Slenderfruit Willowherb: Epilobium leptocarpum
Marsh Willowherb: Epilobium palustre (Synonyms: Epilobium lineare, Epilobium oliganthum, Epilobium palustre var. grammadophyllum, Epilobium palustre var. longirameum, Epilobium palustre var. lapponicum, Epilobium palustre var. labradoricum, Epilobium palustre var. oliganthum, Epilobium pylaieanum, Epilobium wyomingense)
Bloodvine, Blooming Sally, Blooming Willow, Fireweed, Flowering Willow, Great Willow Herb, Narrow-leaved Fireweed, Purple Rocket, Rosebay Willow Herb, Tall Fireweed, Wickup, Wicopy, Wickape: Chamerion angustifolium ssp. circumvagum (Synonyms: Chamaenerion angustifolium, Chamerion angustifolium var. canescens, Chamerion danielsii, Chamerion platyphyllum, Epilobium angustifolium ssp. circumvagum, Epilobium angustifolium ssp. macrophyllum, Epilobium angustifolium var. abbreviatum, Epilobium angustifolium var. canescens, Epilobium angustifolium var. macrophyllum, Epilobium angustifolium var. platyphyllum)
Broad-leaved Fireweed, Dwarf Fireweed, Red Willowherb, River Beauty: Chamerion latifolium (Synonyms: Chamaenerion latifolium, Chamerion subdentatum, Epilobium latifolium)