Dalmatian toadflax is a member of the Scropulariaceae or figwort family. Dalmatian toadflax is a herbaceous perennial weed with stems that are robust and somewhat woody at the base and smooth towards the top of the plant. Stems of Dalmatian toadflax are waxy and can grow 2 to 3 feet tall. The leaves of the plant are alternate, light green, waxy, and heart-shaped. The base of the leaf tends to clasp the stem. Flowers, which grow at the bases of upper leaves, resemble a snapdragon and are bright yellow with an occasional orange colored throat. A long spur is located at the base of the flower and can be as long as the rest of the flower combined. Dalmatian toadflax seeds are diskshaped 0.08 inch in diameter, dark brown to black in color, and often have irregular papery wings.
Dalmatian toadflax can be distinguished from yellow toadflax by leaf structure. Dalmatian toadflax has broad, heart-shaped leaves and yellow toadflax has narrow, linear leaves.
Dalmatian toadflax is considered a noxious weed under North Dakota state law, thus landowners are required to eradicate or control the spread of the plant.