Firat, MehmetEroglu, Huseyin2025-05-102025-05-1020230373-296710.15553/c2023v781a72-s2.0-85164840525https://doi.org/10.15553/c2023v781a7https://hdl.handle.net/20.500.14720/20285A new species, Hypericum celikaensis Firat & Eroglu, belonging to section Arthrophyllum Jaub. & Spach, is described and illustrated from Celikhan/Adiyaman Province, Turkey. The species is similar to H. rupestre Jaub. & Spach and H. cardiophyllum Boiss. However, it is easily distinguished from H. rupestre by its two-lined stem and the free sepals (at base) with fewer black glands. It differs from H. cardiophyllum in having sessile black glands on sepals and asymmetrically retuse petals. In addition, the pollen and the seeds of both H. celikaensis and H. rupestre are characterized. An amended identification key to the species of Hypericum sect. Arthrophyllum in Turkey is provided, as well as detailed pictures of living plants.eninfo:eu-repo/semantics/closedAccessHypericaceaeHypericum Section ArthrophyllumTurkeyAdiyamanEndemicNew SpeciesTaxonomyArticle781Q4Q47987WOS:001028542900007