Hybridises with with other Willowherbs, namely:

• Short-Fruited Willowherb (Epilobium obscurum) to produce Epilobium × aggregatum
• New Zealand W illowherb (Epilobium brunnescens) to produce Epilobium × confusilobum
• Great Willowherb (Epilobium hirsutum) to produce Epilobium × erroneum
• Square-stalked Willowherb (Epilobium tetragonum) to produce Epilobium × haussknechtianum
• American Willowherb (Epilobium ciliatum) to produce Epilobium × interjectum
• Rockery Willowherb (Epilobium pedunculare) to produce Epilobium × kitcheneri
• Hoary Willowherb (Epilobium parviflorum) to produce Epilobium × limosum
• Pale Willowherb (Epilobium roseum) to produce Epilobium × heterocaule
• Spear-leaved Willowherb (Epilobium lanceolatum) to produce Epilobium × neogradense

Lookee-Likees : Many other Willowherbs!

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