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.

Soft-wooded aromatic shrub or tree 1-6m high.  Leaves ovate or ovate-elliptical, 20-40 x 12-25 cm, acute to short acuminate at the apex, deeply and unequally cordate-auriculate at base, margins densely white-ciliate, petiole winged to the apex; inflorescence a spike, whitish to light yellow, pendulous, 10-20 cm x 3-5 mm; fruit, small, three-angled.