Corydalis are very popular rock garden plants.
Some thrive in woodland settings, some in the regular garden and some tuberous species are exquisite in a sandbed/scree garden or alpine house.
Corydalis ornata may be white or blue. The picture above shows two seedlings growing side by side. (Photo by Mike Slater.)
Corydalis flowers come in many colors. Corydalis lutea is an easy-to-grow, bright yellow flowered species. It is not fussy as to conditions and provides colour throughout the season. Some find that this species seeds excessively, but it can be a useful plant in some areas and climates, with the removal of excess seedlings.