Fumarioideae
Fumarioideae is a subfamily of the family Papaveraceae. It was formerly treated as a separate family, the Fumariaceae. It consists of about 575 species of herbaceous plants in 20 genera, native to the Northern Hemisphere and South Africa. The largest genus is Corydalis.
Description
Flower shape
Plants in the fumitory subfamily are easily recognised by their peculiar flowers with two dissimilar pairs of petals. One or both of the outer petals is usually spurred, and the inner petals are connected at tip.There are two types of flowers. A given genus has one type or the other. Dicentra has flowers with two planes of symmetry, and Corydalis has flowers with one plane of symmetry.