All Corydalis species are delicate, low-growing, and sometime form mats. Flowers in terminal racemes with a few florets, each light yellow, the petals converging (but not fused) into a tubelike appearance with a spur; the supporting stem attached near the center of the flower rather than at the end. Blooms April-May. Leaves similar to Dutchman’s breeches; compound, with fernlike, dissected divisions, carried on flowering stems and arising from base, bluish green.
There are four species of Corydalis in Missouri, and they are quite similar in appearance.