C. officinalis: annual or biennial; stems seldom above six inches long, diffuse, glabrous, and somewhat fleshy; leaves stalked, orbicular or reniform, the upper ones ovate or oblong, sinuate, sessile; flowers white, in short racemes, the petals obovate, spreading; pods globular or obovate. - Muddy or sandy soils on the sea-coasts. Fl. June to August.

Var. danica: leaves stalked, the lower cordate, lobed, the upper 3-5-lobed, subdeltoid; pods ovate. - Sea-coast.

Var. anglica: leaves ovate-oblong, entire, the upper oblong often toothed, sessile; flowers large; pods ovate-oblong. - Sea-coast.