Taxonomic and Nomenclatural Contributions to Pyrus L. (Rosaceae) from Turkey

This paper presents a taxonomic contribution to the genus Pyrus L. P. georgica and P. pseudosyriaca are reported from Turkey for the first time. The status of P. pseudosyriaca is discussed and it is treated as a new variety of Pyrus syriaca. Notes on the chorology, morphological descriptions, figures, and taxonomy are provided. Moreover, P. serikensis and P. boissieriana are reduced to synonyms of P. cordata. An endemic subspecies, P. elaeagrifolia subsp. kotschyana, is compared with the related species P. elaeagrifolia and it is reassessed at the species level based on morphology and distribution. With these changes, Pyrus is represented by 18 taxa belonging to 12 species in Turkey.WoSScopu

Polygala Turcica (Polygalaceae), a New Species from E Turkey, and a New Identification Key to Turkish Polygala

Polygala turcica Donmez & Ugurlu (Polygalaceae) is described and illustrated as a new species from Kars province in E Turkey. It is similar to P. peshmenii Eren & al., but is clearly isolated from the other species of Polygala sect. Polygala with respect to habit and morphological characters. Morphology, including that of pollen, is discussed with respect to taxonomic value. The conservation status of the new species is assessed. A new identification key is provided for all Polygala species known from Turkey

Pollen Morphology In The Tribe Nigelleae (Ranunculaceae): A Worldwide Palynological Investigation Into The Species

The pollen morphology of many collections of taxa of the tribe Nigelleae from the family Ranunculaceae which occur worldwide is presented in this study. A total of 88 specimens from 21 taxa, some of which were recently proposed, belonging to the genera Komarojjia, Garidella, and Nigella of Nigelleae were examined using light microscopy (LM) and scanning electron microscopy (SEM). In the tribe, the pollen type is mostly trizonocolpate, but in many taxa and specimens, both trizonocolpate and non-trizonocolpate types occur together. The pollen grains are small to medium (25-53.75 mu m x 20-55 mu m) in size and oblate to prolate in shape. The exine pattern at the mesocolpium in all the taxa investigated is similar: micro-echinate in LM and micro-echinate-punctate in SEM. The colpus membrane in Komaroffia and Ntgella is micro-echinate in both LM and SEM. In Garidella, it is micro-echinate in LM but echinate (spinulose) in SEM. In this study, multivariate analyses, principal component analysis (PCA). and unweighted pair group method with arithmetic mean (UPGMA). were used to evaluate relationships between the genera and species within the tribe with respect to pollen morphology. PCA results show three main groups in the tribe: Gartdella. Komaroffia, and Mgella. Moreover, the UPGMA tree also chiefly supports generic segregation into the smaller genera. An overall synthesis of the pollen characteristics of the three genera is provided and discussed.Wo