Annual, erect herb, up to 70 cm tall; leaves, alternate, exstipulate, palmately lobed, lobes linear to elliptic, entire, acuminate; inflorescence raceme or panicle; flowers blue, white or purple, zygomorphic; bracteate and bracteolate; sepals 5, free or coherent at the base, petaloid, odd sepal posterior, prolonged into a long spur; petals 2-4, small, gamopetalous, the posterior one hooded and drawn within spur of the sepal; stamens numerous, spirally arranged, filaments slender, anthers dithecous; ovary densely pubescent, unilocular with numerous ovules on marginal placenta, style short, curved, stigma simple or capitate, hairy; fruit follicles; seeds wrinkled.