Fumaria parviflora Lam. (Fumariaceae) has yielded the new phthalideisoquinoline alkaloid (-)-corlumine (2) previously known only in its dextrorotatory form. Two known alkaloids not previously detected in F. parviflora are (+)-adlumidine (1) and (-)-cheilanthifoline (3). Phthalideisoquinoline alkaloids as isolated from plants show no pronounced stereochemical preference either at C-l or at C-9. Most protoberberine alkaloids, however, possess the S- chirality at C-14. © 1981, American Chemical Society. All rights reserved.