Blue-purple flowers  Leaves opposite

Salvia farinacea

Salvia lyrata

Salvia reflexa

Satureja arkansana

Scutellaria bushii

Scutellaria elliptica

Scutellaria incana

Scutellaria lateriflora

Scutellaria ovata

Scutellaria parvula

Stachys byzantina

Trichostema dichotomum

Trichostema setaceum

Valerianella olitoria

Verbena bracteata

Verbena canadensis

Verbena hastata

Verbena simplex

Verbena stricta

Veronica arvensis

Veronica comosa

Veronica serpyllifolia