Corydalis aurea Willdenow var. australis Chapman, Fl. South. U.S. ed. 2, 604. 1883; Capnoides halei Small; Corydalis campestris (Britton) J. T. Buchholz & E. J. Palmer; C. halei (Small) Fernald & Schubert; C. micrantha (Engelmann ex A. Gray) A. Gray var. australis (Chapman) Shinners

Stems usually weak. Inflorescences : racemes of chasmogamous flowers often greatly exceeding leaves, elongate; petal spur blunt, not globose at apex. Capsules slender, commonly 15-20 mm.

Flowering very early-late spring. Abandoned fields and waste areas, roadsides, and open woods, in disturbed, often sandy soil; 10-650 m; Ala., Ark., Fla., Ga., Ill., Kans., La., Miss., Mo., N.C., Okla., S.C., Tex.