Additional contributions to taxonomy, nomenclature and biogeography of the Turkish Crataegus (Rosaceae) taxa

Crataegus azarolus L. has a wide distribution pattern from the western Mediterranean coasts to the eastern parts of Iran with several varieties adapted to local climatic conditions. Crataegus azarolus var. senobaaensis var. nov. is described as a new variety from southeast Turkey with characteristic deep leaf sinuses, mostly 3-4 pairs of lobes and leaves ovate-oblong in outline. Two varieties of the species are accepted under the name of Crataegus azarolus and the correct names are published here. Crataegus monogyna Jacq. var. odemisii var. nov. is described from Izmir, in the western part of Turkey. This new variety is distinguished by its orange fruit colour. An outstanding disjunct distribution pattern has been discovered for the recently described species, Crataegus yaltirikii Donmez. Updated descriptions and infraspecific identification keys for Crataegus azarolus and Crataegus monogyna are given and pictures and distribution data for the new taxa are also supplied.