Article

A cytogeographic study of the genus Leucojum in Greece was undertaken. Two taxa of Leucojum, with significant morphological, cytological and ecological differences grow in Greece. Leucojum aestivum, with 2_n_ = 22 chromosomes, occurs in shady places and wet meadows ofthe mainland southwards to N. Peloponnisos, and on some islands. Leucojum valentinum s.l., with 2_n_ = 16 chromosomes, prefers dry, stony, or rocky places, often covered with phrygana, on the Ionian Islands and in W. Sterea Ellas. The Greek populations of L. valentinum s.l. are not morphologically identical with Spanish specimens seen and probably represent an undescribed taxon.