Sub-category: Poppy family
Syn. Corydalis lutea. Yellow corydalis grows to 30 to 38 cm tall. Leaves are finely divided and yellow-green to gray-green, often remaining over winter. Flowers are 2 cm long, borne in racemes on short, branched, leafy stems from late spring to autumn. They have 4 petals, the top and bottom ones crested, the top one with a short, rounded spur curved downwards, the 2 inner ones connected at the tip. Seeds, dark brown with white elaiosomes, are held in oval, flat pods. Plants self-seed abundantly.
In Connecticut it is most commonly found in flower gardens.