An account of natural hybridization within Luzula sect. Luzula (Juncaceae) in Europe

A survey of natural hybrids within Luzula sect. Luzula (Juncaceae) is given. Hybrid combinations reported erroneously in the literature are analysed and veritable records are summarized. Taxonomy of the parental taxa is annotated and a new species is described from the Balkan Peninsula ( L. fallax ). Two new natural hybrids were revealed: Luzula divulgata x L. multiflora (= L. x media) and L. fallax x L. campestris subsp. campestris (L . x bogdanii), new localities are given for L. campestris x L. sudetica ( = L. x heddae) , L. pallidula x L. sudetica. ( =L. x hybrida), L. multiflora s.str. x L. congesta (= L. x danica). Binomials are introduced for the above nothospecies. Other hybrids are briefly mentioned as well. Chromosome numbers, ecology and distribution of the hybrids are given and annotated, selected localities are listed. Some of the hybrid combinations were checked by means of experimental crosses ( L. campestris s.str. x L. pallidula, L. x bogdanii x L. campestris s.str. etc.).