Taxon - Odkazy a literatura
Kew Science - Plants of the World online 2024-05 [77250123-1]
Kew Science - Plants of the World online [https://powo.science.kew.org], Facilitated by the Royal Botanic Gardens, Kew [jako Echium velutinum subsp. versicolor (H.Lindb.) Sauvage & Vindt]
Datum citace: 31. leden 2025