- Botanical.com: Bugloss, Viper's
- Contains information on the distinguishing characteristics of the plant. Includes constituents, medicinal action and uses.
- Florabase: Echium
- Contains information on the idenity of the plant. Includes reproduction, Inflorescence and flower features, fruit and seed features.
- Gardening Eu: Echium vulgare
- Contains information on the general characteristics of the plant. Includes exposure, treatments and development.
- Microscopy-UK and Micscape: A Close-up View of the Strange Wildflower "Viper's Bugloss" (Echium vul
- Presents information on the distinguishing characteristics of the plant. Includes flower features, chemical compounds and images.
- Missouriplants: Echium vulgare L. - Blue Weed, Bugloss
- Provides information on the distinguishing characteristics of the plant. Includes habitat, flowering and photos.
- Plants For a Future: Echium vulgare - L. Viper's Bugloss
- Provides information on the physical characteristics of the plant. Includes habitat, uses, cultivation and propagation.
- United Sates Department of Agriculture: Echium vulgare L. common viper's bugloss
- Offers information on the profile of the plant. Includes distribution, growth habit, classification and images.
- Virginia Tech: Viper's Bugloss or Blueweed: Echium vulgare
- Contains description on the distinguishing characteristics of the plant. Includes seedling, stem information, fruit and photos.
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