From the bulbs of Crinum latifolium, collected at flowering, two new pyrrolophenanthridone alkaloids, pratorimine and pratosine, have been isolated and characterized on the basis of comprehensive spectral analyses, chemical transformation and synthesis. Additionally, four known alkaloids, hippadine, pratorinine, ambelline and lycorine, encountered before in other Amaryllidaceous species, have now been isolated and characterized from C. latifolium. © 1983.