Chromosome numbers and morphometric parameters of five Crocus L. taxa were examined. Except C. specious Bieb. subsp. specious, and C. olivieri Gay subsp. olivieri, the other 3 taxa, C. abantensis T. Baytop et Mathew, C. ancyrensis (Herbert) Maw, and C. biflorus Miller subsp. pulchricolor (Herbert) Mathew all are endemic for Turkey. The chromosome numbers of C. abantensis 2n = 8 chromosomes, six of them metacentric and two were submetacentric, C. ancyrensis and C. olivieri subsp. olivieri both had 2n = 6 chromosomes and all the chromosomes were subtelocentric, finally C. specious subsp. specious and C. biflorus subsp. pulchricolor both had 2n = 8 chromosomes and all were submetacentric. Although some of the taxa chromosome numbers were known from previous studies, in this study some different counts were and their detailed karyotypes were presented.

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Detailed karyotypic investigation of five species (Q. hartwissiana Steven., Q. frainetto Ten., Q. macranthera subsp. syspirensis (C. Koch.) Menitsky, Q. virgiliana Ten., and Q. trojana Webb) belonging to the genus Quercus was carried out in order to contribute to the taxonomic relationships of the genus. The somatic chromosome number was found to be 2n = 24 in all taxa examined. Q. hartwissiana, Q. frainetto and Q. macranthera subsp. syspirensis showed similar karyotypes, consisting of 22 metacentric and 2 submetacentric chromosomes. The karyotype of Q. virgiliana included all metacentric chromosomes and finally Q. trojana showed the highest variation according to karyotypic description (14 m + 10 sm), haploid complement and other morphometric parameters. The study results showed similarity with previous reports in Turkey, different to European oaks.

The genus Quercus (Fagaceae) includes the most important woody plants with decidious and evergreen species in Northern hemisiphere. They have a problematic taxonomy because of widespread hybridization between the infrageneric taxa. Turkey is one of the most important region of the world according to oak species number and variation. In this study, species belonging to evergreen oaks in Turkey were investigated to solve taxonomic problems and to design the limit of taxa by using random amplified polymorphic DNA (RAPD) data. Here, three species of evergreen oaks known as Quercus coccifera, Quercus ilex and Quercus aucheri were studied in all area located and made the comparison within and among species studied using ten RAPD markers. As a result; it can be stated that the presence of the three species in Ilex section is clear. Furthermore, existence of two infraspecific taxa or two seperate taxa in species level within Q. coccifera may be quite possibly considered.

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