In this study, the anatomical characteristics of the leaves of the Juniperus section of the Juniperus L. species [Juniperus drupacea Lab.; J. communis L. var. communis; J. communis var. saxatilis Pall.; J. oxycedrus L. subsp. oxycedrus; and J. oxycedrus subsp. macrocarpa (Sibth. & Sm.) Ball] are reported for those samples naturally distributed in Turkey. | A. GÜVENÇ, M. M. HÜRKUL, A. ERDEM Research Article Turk J Bot 35 (2011) 251-260 © TÜBİTAK doi: The leaf anatomy of naturally distributed Juniperus L. (Cupressaceae) species in Turkey Ayşegül GÜVENÇ*, M. Mesud HÜRKUL, Ali ERDEM Ankara University, Faculty of Pharmacy, Department of Pharmaceutical Botany, 06100 Tandoğan, Ankara - TURKEY Received: Accepted: Abstract: In this study, the anatomical characteristics of the leaves of the Juniperus section of the Juniperus L. species [Juniperus drupacea Lab.; J. communis L. var. communis; J. communis var. saxatilis Pall.; J. oxycedrus L. subsp. oxycedrus; and J. oxycedrus subsp. macrocarpa (Sibth. & Sm.) Ball] are reported for those samples naturally distributed in Turkey. Microscopic views of the transverse and surface sections from the leaves of each species were examined and described. Differentiations were made between 3 species as a result of observations of the arrangement of the palisade parenchyma and the location of the secretory canals. Key words: Juniperus, leaf, anatomy, Cupressaceae Türkiye’de yetişen Juniperus L. (Cupressaceae) türlerinin yaprak anatomisi Özet: Bu çalışmada, Türkiye’de doğal olarak yetişen Juniperus seksiyonunda yer alan Juniperus L. türlerinin [Juniperus drupacea Lab., J. communis L. var. communis, J. communis var. saxatilis Pall., J. oxycedrus L. subsp. oxycedrus, ve J. oxycedrus subsp. macrocarpa (Sibth. & Sm.) Ball] yapraklarının anatomik özellikleri değerlendirilmiştir. Her bir türün yapraklarından alınan enine ve yüzeyel kesitler ışık mikroskobu ile incelenmiş ve tanımlanmıştır. Palizat parenkimasının durumu ve salgı kanallarının yerlerinin bu 3 türde farklılık gösterdiği görülmüştür. Anahtar sözcükler: Juniperus, yaprak, anatomi, Cupressaceae Introduction The genus Juniperus L. (Cupressaceae) is represented by about 70 species in the northern hemisphere and extends south, especially in mountainous regions, into the Himalayas, .