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Posters
66
PHENETIC ANALYSIS OF THE CRATAEGUS L. (ROSACEAE) TAXA
Ali A. DÖNMEZ
Department of Biology, Faculty of Science, Hacettepe University, 06800, Beytepe, Ankara, Turkey.
donmez@hacettepe.edu.tr
The study is based on the Crataegus species collected from the field in Turkey and Iran or
deposited at various herbaria. For this purpose, among all of the selected characters, 75 of
morphological characters are found useful and they have been studied for 35 taxa as
operational unit (OTU). The data is analyzed with the NTSYSpc package program for
understanding the similarities among OTU’s. According to obtained phenogram, the taxa
belong to the complexes Crataegus azarolus, C. monogyna, and C. orientalis are distinct from
the other taxa. Beside this, the results obtained from numerical taxonomic and classical study
are not in congruence at least subgeneric level. Furthermore, some of the taxa in species and
subspecific level do not support to the classical taxonomic result. The basic problem for
taxonomy of the genus seems to be hybridization and intermediate forms related to ecological
conditions.
Keywords: Crataegus, Rosaceae, taxonomy, Turkey
FLORAL MORPHOLOGY AND TAXONOMIC SIGNIFICANCE OF
THE NIGELLA L. (RANUNCULACEAE) TAXA
Ali A. DÖNMEZ 1 , Zübeyde U�URLU 1
1 Department of Biology, Faculty of Science, Hacettepe University, 06800 Beytepe, Ankara, Turkey.
donmez@hacettepe.edu.tr; zubeydeugurlu@gmail.com
Nigella, which is divided into three genera based on floral morphology by some authors, are
very diverse in shape. Sepals are petaloid and showy; petals are specialized and bearing
nectary; stamens are primitive in respect of number and anthers shape; fruit is a capsule of
united or semi-united carpels. Leafy bracts in a few species of the genus enclose flowers. The
parts of the flowers have been examined and studied in respect of morphometric approaches.
The data which have been composed of 27 floral characters have been analyzed with the
NTSYSpc package program. These characters have been also evaluated from taxonomic and
evolutionary point of view. The study in the floral characters shows that variation of them is
extremely high in comparison with other morphological characters and essential for taxonomy
of the genus. This study supports to segregation of Nigella into three separate genera.
Keywords: Floral morphology, cluster analysis, Nigella, taxonomy.
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