PlantFiles: White Corydalis, Fumewort
Corydalis ochroleuca

The longest blooming perennial I know, from June straight through till frost. Except for the flower color, it's almost indistinguishable from Corydalis lutea. Like it, it can self-sow excessively, but the seedlings aren't difficult to control. Blooms in deep shade. Unattractive to deer and other varmints. Its tough constitution belies its delicate appearance.

Dainty, delicate plant with long blooming season. White flowers, touched with yellow; ferny blue-green foliage. Does not go dormant in summer. A short-lived perennial. Doesn't transplant well but seeds in readily, especially in rock crevices and along walls. Not as prolific as Corydalis lutea in my garden.

Fully zone 4 hardy - I got this plant in a pot - I was curious about growing other corydalis since they are in the same family or close family to bleeding hearts. They seed more aggressive than C. lutea and loves woodland shade but seem to take years before they bloom. Height of this species varies more than the reported height - the first plant I had more room and grew nearly 2 feet tall at its blooming time but with more competitions it is smaller than one foot. Flowers look like a very pale butter and eggs snapdragon with its creamy colors with bright yellow at the mouth. Seem to transplant better than C. lutea.