title: Corylus L.: Its diversity, geographical distribution and morpho-anatomical characteristics with special reference to the systematic classification and phylogenics of Turkish hazel (Corylus colurna L.)
abstract: Botanists have not yet reached an agreement regarding the number of species and lower taxa within the Corylus L. genus (hazel). According to different literature sources worldwide, 14, 16,18, or 20 species have been described within the genus. There are many synonyms in the scientific literature for the same species, which creates additional confusion in determining the total number of species within the genus. According to the WCSP (World Checklist of Selected Plant Families), (http://apps.kew.
journal: Sustainable Forestry Collection