Cytotaxonomic consideration of Allium fuscum Waldst et Kit (Liliacea), a critical species of the European flora

A critical species of the European flora, Allium fuscum WALDST. & KIT., belonging to A. sect. Codonoprasum RCHB., is investigated. The species was previously confused with other taxa of the A. paniculatum group, but on the basis of herbarium and field investigations A. fuscum is a rare chasmophyte, distributed in Romania and Bulgaria. The description, chromosome number (2n=16), taxonomy, chorology and ecology are provided. The relationships of this species with some related taxa of the A. paniculatum group are also examined.