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    Morphological, anatomical, palynological, and micromorphological characters of 2 endemic species of Ornithogalum (O. chetikianum and O. demirizianum) in Turkey
    (TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2015) Citak, Burcu Yilmaz; Dural, Huseyin; Buyukkartal, Hatice Nurhan; Pinar, Nur Munevver
    In this investigation, the comparative morphological, anatomical, palynological, and micromorphological characters of Ornithogalum chetikianum Uysal, Ertugrul & Dural and O. demirizianum Malyer & Koyuncu, which belong to Ornithogalum subgenus Myogalum (=Honorius) (Asparagaceae), are presented. In accordance with the new observations, dimensions of some morphological characters are revised as distinct from the previous description of the species. Anatomical investigations of roots, scapes, and leaves were found to be useful for taxonomy. Some anatomical characters, such as the number of protoxylem arms in the root, the number of cortex and sclerenchyma layers in the scape, and type of mesophyll cells in the leaf, provide information of taxonomical significance. Pollen grains of O. chetikianum are monosulcate, but the pollen grains of O. demirizianum are both monosulcate and zonosulcate (10%). As a result of this study, some pollen characteristics such as aperture type, pollen shape, and exine ornamentation were demonstrated to be different between the species. Capsules and seeds of the species are different from one another, especially in their shapes. The investigated species are compared with the other studied species in the subgenus Myogalum.
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    Morphological, palynological, seed-coat surface and karyological studies of Hesperis bicuspidata and H. stellata (Cruciferae) from Turkey
    (WILEY, 2011) Duran, Ahmet; Unal, Fatma; Pinar, Nur Munevver; Cetin, Ozlem
    The taxonomic delimitation of Hesperis bicuspidata (Willd.) Poir. and H. stellata F. Dvorak is problematic, and we therefore studied morphological, palynological, seed-coat surface and karyological features of both species to determine their degree of similarity. The morphology was described using 13 characters, each based on ten measurements on different specimens. Hesperis stellata and H. bicuspidata both show large variation in vegetative and reproductive organs; petal length varies between 18 and 26 mm and petal width is 37 mm; the corolla is lilac, whitish lilac, violet, dark violet or white in color, and fruits of both species are generally glabrous or have very short bifurcate hairs. Pollen and seed morphology were examined by LM and SEM. Pollen of both species is prolate-spheroid or subprolate, tricolpate and reticulate. Their exine structures are the same. Hesperis bicuspidata is diploid (2n=14) but different chromosome types were present in the two studied specimens. Hesperis stellata is tetraploid (2n=28) showing the same chromosome types as the samples of H. bicuspidata. Eighteen morphometrical characters of H. bicuspidata, H. stellata, H. pisidica and H. armena were analysed by ANOVA. Notes on ecology and distribution are also presented for H. bicuspidata. Based on the results, H. stellata is reduced to a synonym of H. bicuspidata.