Viper's Bugloss is primarily a weed of pastures, roadsides, and noncrop areas. Rosette leaves narrow to a short petiole. Leaves that occur on the flowering stem are also oblong to linear-lanceolate in outline but do not have petioles. Flowering stem leaves also become progressively smaller up the stem. All leaves have white 'speckles' that give the leaves a dimpled appearance and also have relatively long white hairs.
Stems also have relatively long, bristly hairs.
Bright blue to purple in color, approximately 8 to 12 mm long. Flowers somewhat resemble a funnel and also have external hairs. The 'dimpled' appearance of the leaves and bright blue to purple flowers of viper's bugloss helps to distinguish this weed from most other weed species.