Blue flowers Opposite leaves

Agastache scrophulariifolia	Ajuga reptans	Blephilia ciliata	Buchnera americana
Buddleja davidii	Clematis fremontii	Clematis pitcheri	Clematis versicolor
Clinopodium arkansanum	Collinsia verna	Collinsia violacea	Conoclinium coelestinum
Cunila origanoides	Dipsacus fullonum	Eryngium prostratum	Eutrochium fistulosum
Eutrochium purpureum	Gentiana andrewsii	Gentiana puberulenta	Gentianella quinquefolia
Geranium maculatum	Glandularia canadensis	Glechoma hederacea	Hedeoma hispida
Hedeoma pulegioides	Houstonia caerulea	Houstonia purpurea	Houstonia pusilla
Lindernia dubia	Mazus pumilus	Mentha canadensis	Mentha piperita
Mimulus alatus	Mimulus ringens	Paulownia tomentosa	Penstemon cobaea
Penstemon grandiflorus	Perovskia atriplicifolia	Phlox amplifolia	Phlox bifida
Phlox divaricata	Phlox pilosa	Prunella vulgaris	Ruellia humilis
Ruellia pedunculata	Ruellia strepens	Salvia azurea	Salvia farinacea
Salvia lyrata	Salvia reflexa	Scutellaria bushii	Scutellaria elliptica
Scutellaria incana	Scutellaria lateriflora	Scutellaria ovata	Scutellaria parvula
Stachys byzantina	Syringa vulgaris	Trichostema brachiatum	Trichostema dichotomum
Trichostema setaceum	Valerianella locusta	Verbena bracteata	Verbena hastata
Verbena simplex	Verbena stricta	Veronica americana	Veronica anagallis-aquatica
Veronica arvensis	Veronica catenata	Veronica hederifolia	Veronica persica
Veronica polita	Veronica serpyllifolia	Veronica spicata	Veronica triphyllos

Vinca major

Vinca minor