The fruit is an achene containing one seed. It is approximately globular, slightly wider than high and with an apical notch. It contains alkaloids, potassium salts, and tannins and is also a source of fumaric acid.
A certain type of fruit consists of an achene with a single seed. The fruit is roughly round in shape, being slightly wider than it is tall, and has a small notch at its top. It contains various compounds, including alkaloids, potassium salts, and tannins, as well as fumaric acid.