Any corydalis named after Janis Ruksans, corydalis guru, has to be good. This is. The flowers resemble those of C. nudicaulis, but with the chocolate coloration confined to their tips, giving them a rather endearing “button nose” look. Here in Rhode Island (a far cry from Central Asia), Ruksans’ corydalis grows and increases well in porous, summer-dry soil. Steppe; Tadjikistan. Zone 5.