Hypericum taxa of Turkey's flora and intra-population variation of morpho-agronomic traits in H. heterophyllum Vent., an endemic species

Abstract

Hypericum L. belongs to the Clusiaceae (= Guttiferae) family. There are 98 species or 119 taxa of Hypericum, 49 of which are endemic in Turkey Flora, and the endemism ratio is 41.18%. Some of these species are used in various diseases externally/internally in the form of infusion, decoction, oleate or ointment in traditional treatment in Turkey. H. heteropyhllum is an endemic species that grows in arid, stony or rocky calcareous areas. In our study, the average plant height and number of branches were determined as 52.48±10.65 cm and 7.85±3.01, respectively in full flowering stage. The average length and width of the oval shaped seeds was 2.3220±0.1524 mm and 0.7933±0.0755 mm, respectively. Seeds of the plant is very small and average seed weight of 1000 seeds is 0.75975±0.0300 g. The highest fresh herb weight (587±251.91 g/plant) was obtained from plants collected at full flowering. The wide variation was observed especially in plant height and number of main branches in the measurements made on plants in the natural area.