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Crepis gemici sp. nov. (A) seed, (B) spiculate seed coat, (C)Á(D) pappus, (E)Á(F) pollen. Photographs taken by SEM.
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Crepis gemicii Hasan Yıldırım, Ömer Bingöl & Metin Armağan (Asteraceae) is described as a new species. Diagnostic morphological characteris, full descriptions and detailed illustrations are given on the basis of the type material. Crepis gemicii is restricted to the province of Van in east Anatolia, Turkey. It is releated to and compared with C. bu...
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In 1947 Babcock published his widely acknowledged monograph of the genus Crepis L. including a sectional classification of the species as well as extensive hypotheses about character evolution. To reinvestigate Babcock's evolutionary hypotheses and the generic delimitation of Crepis L. a phylogenetic analysis was conducted using ITS and chloroplast...
Se discute la tipificación del nombre Crepis sancta (L.) Babc. in Unif. Calif. Public. Bot. 19: 403 (1941) [≡ Hieracium sanctum L., Cent. Pl. II: 30 (1756), basiónimo] (Compositae, Cichorieae). La designación del correspondiente tipo está basada en la consulta del material original de Linneo y la bibliografía citada en el respectivo protólogo. El m...
Crepis rubra is reported for the first time for the Bulgarian flora. The species was discovered near Madzharovo town, in the floristic region of the Eastern Rhodopi Mts. The article contains information about its morphology, general distribution, habitat, and population.
Citations
... Later on, the existing plant samples in VANF herbarium were traced and endemic taxa a belonging to Van Lake basin were listed together with the necessary information about the taxa. Meanwhile the related literature (Behçet, 2001;Doğan and Akaydın, 2004;Özgökçe et al., 2005;Sutorý, 2005;Akan et al., 2008;Karabacak and Behçet, 2009;Dirmenci et al., 2010;Eker and Babaç, 2010;Yıldırım et al., 2011;Yıldız et al., 2011;İlçim et al., 2013;Vitek et al., 2014;Yıldırırm, 2014;Doğan et. al., 2015;Tekşen and Karaman, 2015;Fırat and Yıldız, 2016;Gültepe et al., 2016;Fırat, 2017a,b;Pınar, 2017) concerning the endemic plant taxa of Van Lake basin were also traced, and an endemic plant list with 259 taxa was created. ...
This study was carried out on endemic plants collected from the Lake Van basin between 1994 and 2002. As a result, 98 endemic taxa, 23 of which grow only in the Lake Van basin, were determined. Including the endemic taxa reported before from the region, a list of 259 endemic taxa belonging to 34 families and 117 genera were compiled. Twenty-three of 259 taxa listed, are unique to the Lake Van Basin. There are 249 endemic taxa in the VANF Herbarium. The authors collected 98 of them. The other 151 endemic taxa were determined by other researchers. Ten endemic taxa were recorded from the literature. In addition to the features in the Flora of Turkey, new features and variations of nine endemic taxa identified. Total 612 images and 200 pictures belonging to 98 endemic taxa scanned and transferred to computer. All images were uploaded to the web page, Virtual Herbarium of the Lake Van Basin, which is also a part of VANF Herbarium.
... The Genus Crepis L. (Asteraceae, Cichorieae) has more than 200 species which are distributed over a wide area in all continents, excluding Australia (Lack, 2007). The centre of origin of the Genus is presumably recognized as Pamir/Altai area in central Asia (Babcock, 1947;Yildirim et al., 2011). The Crepis has about 47 species in Turkey and 8 of them are endemic to Turkey (Guner et al., 2012). ...
Fruit morphology and anatomy have taxonomic importance in Asteraceae. The fruits structures of Crepis from Turkey, which include five species (C. alpina, C. smyrnaea, C. pulchra, C. zacintha, C. sancta) and two subspecies (C. foetida subsp. foetida and C. foetida subsp. rhoeadifolia) were studied for fruit morphological and anatomical characters with oneway analysis of variance, cluster analysis and principal component analysis. Fruit size, shape, color, and the presence of beak were observed with stereomicroscopy. Whereas the surface patterns of fruit and pappus were examined using scanning electron microscopy (SEM). Furthermore, pericarp structure, thicknesses of testa and endosperm, and number of rib, cotyledon width in cypsela were studied anatomically. Results indicated that cypsela sizes, the presence or absence of beak on the cypsela, fruit and pappus surfaces, pericarp. Thickness of testa and endosperm, and number of ribs are of major importance to illustrate interspecific relations among the examined taxa. Also, this investigation is a preliminary study, which was performed to use fruit morphological and anatomical characters for their practicality on the classification of taxa within the genus.
This study investigated the pollen morphology of the taxa belonging to the genus Crepis L. collected from various localities in Çanakkale in 2015. Wodehouse (1935) and Acetolysis (Erdtman, 1960) methods were used in the research. Pollen morphologies of 3 species and two subspecies belonging to the Crepis L. genus were defined according to light microscopy (LM) and scanning electron microscopy (SEM) examinations. In LM, pollens are monad, radially symmetrical and isopolar. Pollens are suboblate and oblate spheroidal, Amb shape is interhexagonal-subtriangular. The pollen of the genus is tricolporate. The view from the equator is circular and oval. In the examinations made with LM, the ornamentation is echinulophate. Pollen has 15 lacunae as 3 poral, 6 abporal, 6 paraboral. Ornamentation is echinulophate; the tectum surface is microperforate. SEM micrographs of C. smyrnaea and C. commutata pollen show depressions at the corners of the polar field. The collapses are located on the paraboral lacunae and are distinctly lacuna-like. As a result, in this study, palynological features of C. smyrnaea DC., C. micrantha Czerep., C. commutata (Spreng.), C. reuterana Boiss. & Heldr. subsp. reuterana taxa were studied for the first time. C. smyrnaea DC. ex Froel. was collected for the first time in Çanakkale within the scope of this study, according to the type records in Flora of Turkey.
In the present study, the micromorphological structure of achene, pappus and style using scanning electron microscope (SEM), stomatal characteristics, anatomy of stem and achene together with chromosome number and nuclear DNA content of the Turkish endemic Crepis macropus Boiss. & Heldr. are provided in order to expand knowledge of its taxonomy. The SEM studies in this species show that dense spiny cells are found on the achene surface, the pappus bristle has 3–5 spikes and the style possesses slender papillae. The stem structure is composed of epidermis, collenchyma, parenchymatous cortex and pith. The species has anomocytic stomata in both the upper and the lower surface of the leaves. The pericarp of the achene is mainly composed of several layers of sclerenchymatous cells. In this species, the chromosome number is 2n = 2x = 8, karyotype consists of two submetacentric and six subtelocentric chromosomes and nuclear DNA content (2Cvalue) is 12.96 pg. These data are presented here for the first time and their taxonomic values are discussed.
In this paper, we present advances in studies of Compositae pollen morphology made over the past two years, focusing on the presentation of novel pollen morphological data, the potential systematic implications for presently unplaced taxa, and a bibliography of the literature. The pollen of Allittia, Castroviejoa, Lorandersonia, Pembertonia and Rhetinocarpha was found to be typical of their taxonomic placements in Astereae and Gnaphalieae, showing a helianthoid pollen type. That of Berylsimpsonia is also congruent with its current taxonomic position in Mutisieae, corresponding to an anthemoid type with an infratectum comprising two layers of robust columellae, separated by a spongy internal tectum. The pollen of Cavea, at present incertae sedis, was found to be highly distinctive with prominent, peg-like spines. The palynological data suggest affinity to Mutisieae or Vernonieae, and indicate that palynology continues to play a useful role in the systematic study of unplaced taxa. The bibliography of 172 references indicates the high level of research activity currently taking place in Compositae pollen morphology; we highlight some aspects of the taxonomic distribution of this research.
