Turkish Filbert (Corylus colurna) is a Euro-Siberian taxon and its main sprea-ding area is the Black Sea climate and the northern parts of Anatolia, being under the influence of this climates. Its existence was known on Budağan Mountain and Murat Mountain within the borders of the Kütahya province. A new natural distribution area belonging to this species has been identified by us during our research on the Şaphane Mountain. We recorded the Turkish filbert (Corylus colurna) spread over the northern hillside of Şaphane Moun-tain, in the area dominated by the humid forest. It was found between 1320-1500 m height on the northern and eastern facing hillsides of the calcareous structure Dişkaya Hill (1543 m). It is seen together with species such as silver linden (Tilia tomentosa), Oriental beech (Fagus orientalis), Anatolian black pine (Pinus nigra), trembling poplar (Populus tremula), white beam (Sorbus aria) and cade juniper (Juniperus oxycedrus), and spread in individuals in a very limited area. Corylus colurna areas are narrowing everyday in our co-untry, even tough it is a preferred tree type for furniture production due to the durability of the wood and accepting varnish well. Turkish filbert (Corylus co-lurna), which has a limited spread, needs to be taken under protection in this new spread area on Dişkaya Hill. The purpose of this paper is to explain the new natural distribution area on the northern hillside of Şaphane Mountain, which was identified by us for the first time, and ecological features of one of the endangered species, Corylus colurna, whose distribution area in our co-untry is not wide. The paper also aims to contribute to the academic literature on the natural distribution of the plant in Turkey. Our literature review yields that there was not any study with the traces of the plant on Şaphane Mountain.
Corylus colurna, Turkish Filbert, Saphane Mountain, Natural distribution, Kütahya.