a, the seed.
f, the ribbed wings (mericarps).
This image is from Angelica in Harding's Ginseng and Other Medicinal Plants, 1936.
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.
http://www.henriettes-herb.com - Copyright 1995–2023 Henriette Kress.