Ornithogalum christiniae collected from the offshore islet of Agria Gramvousa (Northwestern Crete), is described and illustrated as a local endemic species, new to science. It is related to the species Ornithogalum montanum, O. atticum and O. pumilum, however, it differs from its relatives in having wrinkled and corrugated leaf surface, thickened fruiting pedicels at base, flexuose rachis of infruitescence and winged capsules. The relationships between the new species and the aforementioned are discussed, while information regarding its ecology, conservation status and karyotype is also given.

The raw data are chromosomes measurements from three good metaphase plates. In the tables the relative length (R-length) and arm ratio (r-index) values of the haploid chromosome complement is given.