Herbaceous annual up to 1 m. Large lower leaves, broadly oblong or obovate with serrated margins, the upper leaves are cauline, simple, narrower, lobed, dentate or entire, short petioles or sessile. Bright yellow flowers of 7 to 10 mm. Fruit in the form of a pod 4 to 7 cm long, dark brown seeds up to 2 mm in diameter.

Perennial herb, 60-100 cm high,with soft thick-stems, succulent, hairy, aromatic.  Leaves blades, 2.5-4.5 x 2.5-4 cm, thick and soft, broadly ovate, truncate-subcordate at the base, apex obtuse to rounded, margins crenate, both surfaces densely pubescent with glands; inflorescence a raceme 10-30 cm long; flowers bilabiate, corolla 7-9 mm long, lilac to whitish.

Annual or perennial acaulescent herb with a taproot producing numerous fibrous lateral roots. Leaves, glabrous, forming a basal rosette, petioles 2-15 cm long, blades ovate to elliptic, 2.5-25 x 3-12 cm, base abruptly narrow, apex obtuse, margins coarsely dentate; inflorescence a spike spike, linear-cylindrical, 5-25 cm x 6-8 mm, scape 10-30 cm. long; flowers perfect, corolla lobes 0.5-1 mm long, numerous, sessile, green; fruit a capsule ovate-elliptic 3-4 mm long, seeds brown, oblong 1 x 0.7 mm.