The bilaterally symmetrical flowers have a stout corolla tube with upper and lower lips, 2 lobes above and 3 below. There are 4 or 5 stamens, some of which may lack anthers. The style may be forked. The leaves may be alternate, opposite or whorled and are simple or pinnately divided.

The genus Veronica has more or less radially symmetrical flowers with 4 petals, although the lowest is smaller than the other 3.

Digitalis, the first drug to be helpful in heart disease, is derived from leaves of plants in the Digitalis genus. Some species of snapdragon are poisonous. Mostly herbs, but one naturalized tree species (Princess tree).

Tree This family contains trees.
Flower This family contains flowers.

Beardtongue, Foxglove Penstemon digitalis
Beardtongue, Hairy/ Eastern Beardtongue Penstemon hirsutus
Blue-eyed Mary Collinsia verna
Butter-and-eggs/ Common Toadflax Linaria vulgaris
Cow-wheat Melampyrum lineare
Figwort Scrophularia marilandica
Foxglove Digitalis purpurea
Foxglove, Downy False Gerardia virginica
Foxglove, Smooth False Gerardia laevigata
Hedge-Hyssop, Clammy Gratiola neglecta
Innocence
Kenilworth-Ivy Cymbalaria muralis
Monkey-Flower, Square-Stemmed Mimulus ringens
Mullein, Common Verbascum thapsis
Mullein, Moth Verbascum blatteria
Neckweed
Princess treeSpecies is a Tree Paulownia tomentosa
Snapdragon, Dwarf/ Small Toadflax Linaria minor (chaenorrhinum minus)
Speedwell, Bird's Eye Veronica chamaedrys
Speedwell, Common Veronica officinalis
Speedwell, Corn Veronica arvensis
Speedwell, Field Veronica agrestis
Speedwell, Persian/ Bird's Eye Veronica persica
Speedwell, purslane Veronica peregrina
Speedwell, Thyme-Leaved Veronica serpyllifolia
Turtlehead Chelone glabra