Self-compatibility has been found to occur in a diploid, sexual plant of Taraxacum section Taraxacum after natural and artifical self-pollination of caged-in capitula. Only one out of 72 plants investigated proved to be self-compatible. This is the first record within the section Taraxacum of potential autogamy in a plant collected from the field. It was shown that self-compatibility is heriditary. No relation could be found between the point of time within the flowering season and the selfcompatibility of the plants tested.