Roots can associate with vesicular-arbuscular mycorrhizae. Dalmatian toadflax roots can penetrate soil to depths of 2 m or more. Lateral roots are typically 5-20 cm below the soil surface and can extend outwards to 3.5 m in all directions. Flowers showy, yellow, snapdragon-like . Stamens 4, in 2 pairs.
Racemes elongate, dense or open, erect or drooping at the tips.
Corolla bright yellow , sometimes whitish, 1.5-3.5 cm long including spur. Throat and lower lip orange-hairy. Seed occasionally resembles that of yellow toadflax , possibly due to hybridization. Capsules 9-12 mm long . Without cross-pollination, only a few seeds develop.