Flowers: growing singly, or in clusters at the ends of the flower-stalks. Calyx: tubular; of five sepals. Corolla: small; salver-form; of five spreading lobes. Stamens: ten. Pistil: one; styles, five. Leaves: pinnately divided twice or thrice into deeply incised leaflets; hairy. Stem: highly coloured; hairy.
This plant came prominently to the notice of royalty during the time of Robert's plague. It was then supposed to achieve many cures, and was named after Robert of Normandy.
It is one that by the bursting of its pods scatters its seeds to a very great distance.