Literature 2018

Literature Archive: 2015 | 2016 | 2017 | 2018 | 2019


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4 March 2019

Chubar E. A. 2018: онтогенез Nabalus ochroleucus (Asteraceae) [Ontogenesis of Nabalus ochroleucus (Asteraceae)]. – Bot. Zhurn. 103: 1240–1254.

Abstract:
“The life cycle of Nabalus ochroleucus is described in the paper. The results of our research show that the species belongs to pleiocyclic monocarpic plants with monopodial shoot system and short rhizome with adventitious root tubers, rather than to polycarpic perennials and taproot biennials. N. ochroleucus, N. acerifolius, N. tanakae, N. tatarinowii are characterized by similar features of the structure of shoots and root systems. In the taxonomy of the genus Nabalus, its ontogenetic and morphogenetic characters (life cycle, transformation of roots and shoot systems) should be taken into account along with anatomical and morphological features.”

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4 Mar 2019

Dudás M. & Zámečnik J. 2018: New records of Taraxacum cognatum Kirschner & Štěpánek from Western Slovakia. – Thaiszia 28: 1-5.

Abstract:
“In this paper, new sites of rare dandelions Taraxacum cognatum Kirschner & Štěpánek (sect. Palustria) from Strážovské vrchy Mts. are presented. The new populations represent the northern limit and important altitudinal pattern of the distribution of
the species in Slovakia. Despite the fact the species has not been classified in the New Slovak red list, we consider to evaluate T. cognatum as vulnerable species of the Slovak flora.”

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22 February 2019

Roma-Marzio F., Bartolucci F., Domina G. Peruzzi L. & Galasso G. 2018: (2662) Proposal to reject the name Hypochaeris urens (Asteraceae). – Taxon 67: 1225–1226.

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22 February 2019

Maslo S. & Šarić Š. 2018: Lesser Hawkbit, Leontodon saxatilis (Compositae): a new species in the flora of Bosnia and Herzegovina. – Phytol. Balcan. 24: 361–364.

Abstract:
“Lesser Hawkbit Leontodon saxatilis is reported as new to the flora of Bosnia and Herzegovina. The species has been found in several localities in Central Bosnia. The paper presents a short morphological description and photographs of the species based mainly on the collected specimens, as well as the distribution of the taxon.”

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22 February 2019

Vladimirov V. 2018: Hieracium petraeum (Asteraceae): a new casual record in the Bulgarian flora. – Phytol. Balcan. 24: 365–368.

Abstract:
“The  genus  Hieracium  is  notorious  for  its  taxonomic  complexity  due  to  its  specific  reproductive  system  involving normal sexual reproduction, hybridization, polyploidy, and apomixis. It is one of the largest genera worldwide  and  in  the  Bulgarian  flora.  So  far,  no  alien  Hieracium  species  has  been  reported  for  Bulgaria.  However,  fieldwork  in  the  Rila  Mts  resulted  in  the  discovery  of  a  taxon  of  the  Hieracium  amplexicaule collective species (Asteraceae), alien for the Bulgarian flora. Due to their ornamental appearance, plants from this group have been cultivated for more than 70 years in the yard of Sitnyakovo, the former King’s hunting lodge,  and  escaped  specimens  have  recently  been  recorded  in  the  nearby  natural  habitats.  Most  probably,  they belong to H. petraeum (syn. H. amplexicaule subsp. berardianum). A concise morphological description of the Bulgarian material is provided and the alien status of the population is discussed. The genome size and  ploidy  level,  2n  =  4x  =  36,  have  been  estimated  by  flow  cytometry.  The  text  is  illustrated  with  colour  photographs from the locality in the Rila Mts.”

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22 February 2019

Dunkel F. G. & Gottschlich G. 2018: Notes on some taxa of Hieracium and Pilosella (Asteraceae), new for the Greek flora. – Phytol. Balcan. 24: 217–224.

Abstract:
“During floristic investigation of the northern Greek flora, emphasis was laid on the genera Hieracium and Pilosella. As a result, six species and three subspecies of the genus Hieracium and three species of the genus Pilosella were detected in Greece for the first time and reported here. According to the original description and classification, three of these are suggested as meriting the species rank.”

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21 February 2019

Zahradníček J., Chrtek J., Ferreira M. Z., Krahulcová & Fehrer J. 2018: Genome size variation in the genus Andryala (Hieraciinae, Asteraceae). – Folia Geobot 53: 429–447.

Abstract:
“The genus Andryala includes diploid plants distributed in the Mediterranean Basin, Macaronesia and in one isolated outpost in the Romanian Carpathians. We analysed nuclear genome size in a phylogenetic framework and assessed relationships between genome size and life form (perennials vs annuals/biennials) and the consequences of insular vs continental distribution. Absolute nuclear genome size of 18 species or subspecies was determined using propidium iodide flow cytometry. The evolution of genome size was investigated using the Brownian motion model with the tree scaling parameters λ, κ and δ. The mean 2C values differs up to 1.84-fold between species (from 2.69 to 5.01 pg). Chromosome numbers of six species are reported for the first time. The highest 2C values are present in two well supported basal lineages corresponding to the relict species A. laevitomentosa and A. agardhii. The rest of Andryala species that form a well-supported clade of closely related species (the ‘Major Radiation Group’), except for two populations of A. ragusina, have significantly smaller genome sizes. In the ‘Major Radiation Group’, genome size in perennial species is significantly greater compared to annual and biennial species. With a possible bias caused by A. dentata and A. integrifolia, insular species of the ‘Major Radiation Group’ have lower nuclear genomes than continental ones. The genome size variation contains strong phylogenetic signal, which could indicate that genome size in the group under study is not greatly influenced by selection and is probably a result of neutral evolution or genetic drift.”

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21 February 2019

Roleček J., Fajmon K & Šmarda P. 2018: Nález hořčíku jestřábníkovitého velkoúborného (Picris hieracioides subsp. umbellata) v NPR Porážky (Bílé Karpaty) a poznámky k jeho výskytu v České republice [Record of Picris hieracioides subsp. umbellata in the White Carpathians and notes on its occurrence in the Czech Republic]. – Zprávy Českoslov. Bot. Společn. 53: 165–176.

Abstract:
Picris hieracioides (Asteraceae) is a polymorphic species with a complicated taxonomy. Here we report the occurrence of Picris hieracioides subsp. umbellata in the Czech Republic, a subspecies that has not been recognized in modern floras of this area. The identity of the recently found population in the White Carpathian Mts. was determined based on morphological characters and genome size. Further 62 specimens matching this subspecies morphologically were found during a revision of specimens in two major herbaria. They originate from various parts of the country, with the highest concentration in eastern Moravia. The recently found population inhabits a mesic tall-forb grassland dominated by Laserpitium latifolium and Calamagrostis arundinacea, a vegetation type hitherto undescribed from the Czech Republic, but scattered in the peri-Carpathian region. We consider this vegetation a relic from Early Holocene or even Pleistocene forest-steppe vegetation.”

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21 February 2019

Berjano R., Rodríguez-Castañeda N. L., Ortiz P. L., Ortiz M.A. & Arista M. 2018: The link between selfing and greater dispersibility in a heterocarpic Asteraceae. – Amer. J. Bot. 105: 2065–2074.

Abstract:
“Premise of the Study
Although an evolutionary link between breeding system and dispersibility has been proposed, to date empirical data and theoretical models of plants show contrasting trends.

Methods
We tested two competing hypotheses for the association between breeding systems and dispersibility in the heterocarpic Hypochaeris salzmanniana (Asteraceae) by using both an experimental approach and surveys over 2 years of five natural populations along an environmental cline with a gradient of pollinator availability.

Key Results
Hypochaeris salzmanniana
produced two types of fruits, beaked (BF) and nonbeaked (NBF), which differ in their dispersal ability. The BF were lighter and had a lower dropping velocity and higher dispersal distance than the NBF. Potential for long‐distance dispersal, measured as BF ratio per head, had high narrow‐sense heritability. Greater dispersibility and selfing ability were linked at all the scales studied. Both selfed BF and NBF fruits had longer plumes and lower plume loading than outcrossed fruits, characteristics that promote farther dispersal. Natural populations with a higher percentage of self‐compatible plants showed a higher BF ratio. Moreover, selfing led to a higher BF ratio than outcrossing.

Conclusions
The avoidance of inbreeding depression seems to be the most plausible selective pressure for the greater dispersibility traits of selfed seeds. Furthermore, the ability to modulate the BF ratio and thus the potential for long‐distance dispersal of offspring based on its selfed or outcrossed origin could be advantageous, and therefore selected, under unpredictable pollination environments that favor higher dispersive selfers, which overcome both pollen limitation and inbreeding avoidance.”

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31 January 2019

Marciniuk J., Marciniuk P. & Musiał K. 2018: Taraxacum mariae, a new species of T. section Palustria (Asteraceae) from Poland. – Phytotaxa 376: 207–213.

Abstract:
Taraxacum mariae J. Marciniuk & P. Marciniuk is a new triploid species of T. sect. Palustria. In terms of morphology it is closest to the group of T. brandenburgicum and T. bibulum. In the presented paper, the description of the new species, its distribution, diagnostic characters and habitat requirements are provided.”

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31 January 2019

Beharav A., Khalifa S. & Nevo E. 2018: New insights into the range, morphology, and natural hybridization of wild Lactuca aculeata in Israel. – Israel J. Pl. Sci. 65: http://dx.doi.org/10.1163/22238980-00001045

Abstract:
“In recent years we initiated extensive studies on the characterization of the population structure of wild Lactuca relatives (WLRs) originating from their center of origin and diversity in Southwest Asia. The objectives of our research program are related to the identification, collection, distribution, conservation and sustainable use of these unique plant genetic resources (PGR) for breeding. Natural populations of Lactuca aculeata Boiss., a wild lettuce, closely related and fully inter-fertile with cultivated lettuce, L. sativa L., were identified throughout northeastern Israel. The collection includes 485 seed samples, which is likely the largest and most diverse collection of this important WLR. Seeds were collected from 46 locations, representing its ecogeographic distribution in northeastern Israel. Together with 14 additional observed localities, we recorded our observations from a total of 60 native locations of L. aculeata. Thus, we assume that northeastern Israel is an ecological domain where natural L. aculeata populations can be found. The analyzed data allowed us to specify the borders of the growing area in the region, as well as to describe the ecological features of the habitats and altitude distribution of natural L. aculeata within the studied area. Notably, our data included new findings of native locations of L. aculeata on the western side of the watershed in Israel. Selected morphological characteristics, from the regeneration of 185 samples, verified the identity of all except one as L. aculeata. Some progenies (0.27%) of the original collected plants were identified as hybrids of L. aculeata x L. serriola.”

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31 January 2019

Jemelková M., Kitner M., Křístková E., Doležalová I. & Lebeda A. 2018: Genetic variability and distance between Lactuca serriola L. populations from Sweden and Slovenia assessed by SSR and AFLP markers. – Acta Bot. Croat. 77: 172–180.

Abstract:
“The study involved 121 samples of the common weed, Lactuca serriola L. (prickly lettuce), representing 53 populations from Sweden and Slovenia. The seed materials, originating from different habitats, were regenerated and taxonomically validated at the Department of Botany, Palacký University in Olomouc, Czech Republic. The morphological characterizations of the collected plant materials classified all 121 samples as L. serriola f. serriola; one sample was heterogeneous, and also present was L. serriola f. integrifolia. Differences in the amount and distribution of the genetic variations between the two regions were analyzed using 257 amplified fragment length polymorphism (AFLP) and 7 microsatellite (SSRs) markers. Bayesian clustering and Neighbor-Network were used for visualization of the differences among the samples by country. Under the Bayesian approach, the best partitioning (according to the most frequent signals) was resolved into three groups. While the absence of an admixture or low admixture was detected in the Slovenian samples, and the majority of the Swedish samples, a significant admixture was detected in the profiles of five Swedish samples collected near Malmö, which bore unique morphological features of their rosette leaves. The Neighbor-Network analysis divided the samples into 6 groups, each consisting of samples coming from a particular country. Reflection of morphology and eco-geographical conditions in genetic variation are also discussed.”

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25 January 2019

Fırat M. 2018: New status of Gundelia tournefortii L. forma purpurascens Bornm. (Asteraceae) and new record for the flora of Turkey. – Ot Sist. Bot. Derg. 25: 11–24.

Abstract:
Gundelia purpurascens (Bornm.) Fırat comb. & stat. nov. is proposed. Diagnostic and morphological characteristics, as well as full descriptions and the detailed photographs are provided. This taxon occurs in (Seqlawa) north Iraq and Şırnak (east Anatolia).”

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9 January 2019

Wolanin M. M. & Musiał K. 2918: Chorology and taxonomic issues of Taraxacum danubium and Taraxacum tortilobum (section Erythrosperma), new species to the Polish flora. – Wulfenia 25: 17–24.

Abstract:
“In the past 20 years, the interest in Taraxacum has considerably increased among Polish botanists, however, with the exception of marsh dandelions (Taraxacum section Palustria), the taxonomy and chorology of this group are still poorly examined. In 2012, comprehensive taxonomic-chorological studies on Taraxacum sect. Erythrosperma were launched in Poland. T. danubium and T. tortilobum, species previously unknown in Poland, were identified during this research. We found that these rare dandelion species occur in Poland regionally. Karyological analysis showed the triploid chromosome number (2n = 3x = 24) in both taxa. Current research results also suggest that the previously mentioned diploid T. erythropermum does not occur in Poland.”

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19 December 2018

Gottschlich G. & Dunkel F.-G. 2018: New taxa of Hieracium and Pilosella (Asteraceae) - from northern and central Greece. – Stapfia 109: 3-24.

Abstract:
“As a result of targeted collecting and systematical field studies and revisions of herbarium material of the genera Hieracium and Pilosella (Asteraceae), seven new species and two new subspecies of Hieracium and one new species of Pilosella from Northern and Central Greece are described and illustrated: Hieracium sabaudolympicum Gottschl. & Dunkel; H. racolympicum Gottschl. & Dunkel; H. umbrolympicum Gottschl. & Dunkel; H. xanthicum Gottschl. & Dunkel; H. pseudolachenalii Gottschl. & Dunkel; H. gramosicum Gottschl. & Dunkel; H. racolympicum subsp. lycopifoliopsis Gottschl. & Dunkel; H. retyezatense subsp. spathopsis Gottschl. & Dunkel; H. camkorijense subsp. boreograecum Gottschl. & Dunkel, and Pilosella willingorum Gottschl. Due to the taxonomic evaluation of H. pseudolympicum Zahn, a new combination of the taxon into H. sparsum Friv. subsp. pseudolympicum (Zahn) Gottschl. & Dunkel comb. nov. is proposed.”

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19 December 2018

Gottschlich G. 2018: Korrespondenz und andere Archivalien im Nachlass des Hieracium-Monographen Karl Hermann Zahn (1865-1940). Verzeichnis und Auswertung. – Stapfia 109: 197-227.

Abstract:
“A hitherto unknown collection of 437 letters to the monographer of the genus Hieracium, Karl Hermann Zahn (1865-1940), is presented and analysed.”

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19 December 2018

Gottschlich G. 2018: Das Sammlungsmaterial der Gattung Hieracium (Asteraceae) im Herbarium des Museums Wiesbaden [The Hieracium collections in the herbarium
of the Museum Wiesbaden]. – Jahrb. Nassauischen Vereins Naturk. 139: 25–49.

Abstract:
“The Hieracium collections of the Museum of Wiesbaden (WIES) are revised. The collections contain 391 specimens in 106 species (166 taxa incl. subspecies). The most valuable part of these collections are the exsiccata of Fries & Lagger: Supplementum ad Hieracia Europaea exsiccata, ed. 1872, which exist only in few greater European herbaria. Within these exsiccata seven type specimens could be detected. To have a correct name for Pilosella dichotoma under Hieracium a nomen novum is established.”

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18 December 2018

Štěpánek J. & Kirschner J. 2018: Taxonomic revision of selected species in Taraxacum sect. Erythrosperma (Asteraceae: Cichorieae) from the E Mediterranean region. – Willdenowia 48: 365–369.

Abstract:
“Selected species in Taraxacum F. H. Wigg., belonging to T. sect. Erythrosperma (H. Lindb.) Dahlst., described by C. E. Sonck, G. E. Haglund and A. J. Richards, were revised taxonomically. The types of their names were compared with plant material mainly from the Balkan Peninsula and Crimea. The main sources of material were ample collections of R. Willing and E. Willing from Greece (deposited at B), and plants collected and/or cultivated by us from the Balkan Peninsula and Crimea (deposited at PRA). Four names are relegated to synonymy. Taraxacum amborum G. E. Hagl. is newly interpreted and lectotypified, and T. viale Sonck is synonymized with it. Taraxacum edessicum Sonck and T. aestuans Sonck were found to be conspecific with T. salonikiense Sonck. Taraxacum gionense A. J. Richards belongs to T. botanicorum Sonck. Range extensions include T. salonikiense in Albania, T. amborum in Bulgaria, Montenegro and Romania, and T. egnatiae from Ukraine.”

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18 December 2018

Krahulcová A., Krahulec F. & Vladimirov V. 2018: Impact of interspecific hybridization within a polyploid agamic complex of Pilosella (Asteraceae, Cichorieae) in Bulgaria compared with Central Europe. – Willdenowia 48: 345–362.

Abstract:
“The species-mixed Pilosella populations comprising diploid sexual and polyploid facultatively apomictic biotypes were studied in Bulgaria. Parentage of co-occurring recent hybrids was inferred from a combination of morphology and ploidy level that corresponded to simple/multiple crosses of basic species via either reduced or unreduced gametes. The flow cytometric seed screening illustrated the capacity for heteroploid hybridization both in open-pollinated plants in the mixed-ploidy populations and in crossing experiments. The diploid sexual species in Bulgaria have a limited impact on interspecific hybridization, and simple inter-cytotype hybrids are only sporadically formed. The origin of the most common hybrids in Bulgaria that are apomictic and retain the pentaploid/hexaploid ploidy level of a co-occurring putative apomictic parent remains unclear. The absence of stabilized hybridogeneous species and scarcity of commonly hybridizing polyploid sexual biotypes are crucial attributes that distinguish the Pilosella populations in Bulgaria from those in the Czech Republic and Germany. No recent high-polyploid hybrids of 2n + n origin that would potentially become drivers of ongoing hybridization in the mixed sexual-apomictic Pilosella populations similar to those in Central Europe have been recorded in Bulgaria. The pattern of co-occurring cytotypes in Bulgaria likely limits interspecific hybridization due to stronger ploidy barriers.”

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14 December 2018

Chen Y.-S. 2018: Youngia baoxingensis, a new species of Asteraceae (tribe Cichorieae) from Sichuan, China. – Phytotaxa 382: 239–242.

Abstract:
Youngia baoxingensis (Asteraceae, Cichorieae), a new species from Baoxing in Sichuan, China, is described and illustrated. This species belongs to Youngia sect. Mesomeris and is similar to Y. yilingii, but is distinct by its oblong and subentire leaf blade, brown pappus, and 6–7 florets.”

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14 December 2018

Szeląg Z. 2018: Hieracia balcanica XVI. Taxonomic and nomenclatural notes on Hieracium rotundatum and H. transylvanicum (Asteraceae). – Phytotaxa 382: 227–233.

Abstract:
Hieracium rotundatum Kit. ex Schult. and H. transylvanicum Heuff., two species of H. sect. Transsilvanica (Zahn) Schljakov, have been confused under the older name H. rotundatum in the most important European monographs. The original specimen of H. rotundatum stored at BP is recognized as the holotype and re-identified as a representative of the H. praecurrens aggregate. Hieracium transylvanicum is lectotypified using a specimen also stored at the Hungarian Museum of Natural History in Budapest (BP). The original spelling of the species epithet of H. transylvanicum is clarified.”

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26 November 2018

Nilsson T. & Tyler T. 2018: Eight new species of Hieracium sect. Tridentata (Asteraceae) from southern and northern Sweden. – Nordic J. Bot. 36: e01975.

Abstract:
“Eight new species of Hieracium sect. Tridentata, namely H. antrorsum, H. quercifolium, H. stenianum, H. vestrogothicum, and H. vetlandaënse are described from the Götaland region (southern Sweden), H. grothii from Norrbotten in the Norrland region (northeast Sweden), and H. sparsifolium var. suppansum Johanss. and H. adampliatum var. pilosius Ohlsén are raised to specific rank as H. suppansum and H. gothiciferum respectively.”

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26 November 2018

Inceer H., Kalmuk N. A., Imamogly K. V., Arslan G., Duman O., Hayırlıoglu-Ayaz S. & Guner G. 2018: Achene anatomy and stomatal characteristics of eighteen Crepis L. (Asteraceae) taxa from Turkey with notes on their systematic significance. – Nordic J. Bot. 36: e01829.

Abstract:
“Achene anatomy and stomatal characteristics of eighteen Crepis taxa from Turkey are here described for the first time. In all taxa examined the pericarp is composed of several layers of sclerenchymatous and parenchymatous cells. As for the achene, differences among taxa mainly concern the pericarp structure and its thickness and width. Stomata are present on both surface of the leaf in all studied taxa and all taxa have anomocytic type stomata. However, the dimensions (length and width) and density of the stomata differ significantly among the studied taxa. In addition, the dimensions of stomata are negatively correlated with stomata density. It is concluded that achene anatomy and stomatal characteristics are useful for delimitation of Crepis taxa and a key to taxa based on these characters is provided. However, based on achene anatomy and stomatal characteristics, we found no argument for an exclusion of the Lagoseris group from Crepis as has previously been proposed.”

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15 November 2018

Wolanin M. M. Musiał K. & Wolanin M. N. 2018: Taraxacum sandomiriense (sect. Erythrosperma, Asteraceae), a new species from Poland. – Phytotaxa 375: 158–164.

Abstract:
Taraxacum sandomiriense Wolanin, a new species of Taraxacum sect. Erythrosperma from Poland is described. It is a triploid (2n=24) characterized by strongly corniculated inner bracts, brown-colored achenes and distinctly haired leaves. It is an extremely rare taxon found in the xerothermic plant communities in the Świętokrzyskie Province. The species conservation assessment for T. sandomiriense determines its threat status as Critically Endangered, since it consists of three populations with a very small number of individuals. A detailed species description, photographs, distribution map, notes on ecology and chorology are provided.”

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8 November 2018

Gürdal B.,  Štěpánek J., Zeisek V., Kirschner J. & Özhatay N. 2018: What is and what is not Taraxacum bithynicum (Compositae, Crepidinae). – Phytotaxa 373: 197–210.

Abstract:
“The taxonomy, micromorphology, karyology and evolutionary relationships of Taraxacum bithynicum were studied using the original material and new samples from the summit area of Mt. Uludağ, Bursa Province, Turkey. It is sexual with 2n=16, considerably isolated in outer phyllary and achene characters. The nrDNA ITS Neighbor Net analysis shows relationships of T. bithynicum with members of T. sect. Scariosa. Taraxacum bithynicum is considered as a taxon endemic to the summit area of Uludağ. The exploration of the latter area also revealed another, probably related but agamospermous and triploid (2n=24) species that is decribed here as T. pseudobithynicum, also confined to Uludağ. The endemism in the Mt. Uludağ flora is briefly characterized, and the two species studied are expected to be related to other similar plants restricted to mountain areas of SW and S Anatolia. The history of the original gathering of T. bithynicum (Aucher-Éloy, no. 3540) and various concepts of this name in the literature are briefly discussed.”

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8 November 2018

Parkhomenko A. S. & Kashin A. S. 2018: Кариотидическая изменчивостъ уиекоторуых видов рода Chondrilla (Asteraceae) [Karyotypic variability in some species of the genus Chondrilla (Asteraceae)]. – Bot Zhurn. 103: 726–739.

Abstract:
“Karyotypic variability of plants was found in 17 populations of six species of Chondrilla (C. ambigua Fisch., C. brevirostris Fisch. et Mey., C. laticoronata Leonova, C. canescens Kar. et Kir., C. juncea L., C. pauciflora Ledeb.) from Astrakhan, Voronezh and Saratov regions, the Republic of Kalmykia and Western Kazakhstan. It is confirmed that C. ambigua is a strict diploid (2n = 2x = 10), while the closely related C. pauciflora is a strict triploid (2n = 3x = 15). The stably diploid chromosome number in the genome of C. ambigua plants is an additional confirmation that the species is an obligate amphimict. The triloid number of chromosomes in the plants of the C. pauciflora population, even though this species was not studied for its ability to apomictic seed formation, indicates that the taxon is an obligate apomict. Most likely, it is a cytotype derived from C. ambigua, which is very similar both in morphological features and in the results of molecular genetic studies, but is not related by the flow of genes. According to the results of the analysis, the genomes of the apomictic taxa C. brevirostris, C. canescens, C.juncea and C. latironata are characterized by instability with regard to the chromosome number, expressed in the presence in the populations of plants of different levels of ploidy, and of plants with different variants of aneu- and mixoploidy.”

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19 October 2018

Liveri E., Tomasello S., Hammerschmid C., Kamari G. & Oberprieler C. 2018: Differentiation of the endemic Greek genus Hymenonema and its relatives of subtribe Scolyminae (Compositae, Cichorieae) based on a multilocus species tree reconstruction. – Pl. Syst. Evol. 304: 1255–1267.

Abstract:
Hymenonema (Compositae, tribe Cichorieae) together with the genera Catananche, Gundelia, and Scolymus forms the subtribe Scolyminae. It is endemic to Greece and consists of two species, Hymenonema laconicum and Hymenonema graecum, which occur in the south Peloponnisos and central Aegean area, respectively. The present contribution aims at a phylogenetic reconstruction of evolutionary relationships among the 12 species of the subtribe, focusing on the temporal and spatial framework for its evolution. The phylogenetic relationships among the members of Scolyminae were inferred from molecular data based on the multi-copy region of the nrDNA internal transcribed spacers ITS1 and ITS2, two intergenic spacers of the cpDNA (trnL-trnF, rpl32-trnL), and one single-copy nuclear region (D10). The gene trees were reconstructed using Bayesian phylogenetic methods. All gene trees support the monophyly of Hymenonema and the sister-group relationship with the genus Scolymus. The further sister-group relationship of this group (HymenonemaScolymus) with Catananche is also supported by nrDNA and cpDNA analyses. Finally, a species tree (inferred in a Bayesian coalescent framework) was reconstructed and dates the divergence time between the two Hymenonema species to the Pleistocene (around 1.3 Ma ago). Maximum likelihood-based biogeographical reconstructions suggest a Miocene (pre-Messinian) differentiation of the subtribe on the northern Tethyan platform, followed by Miocene/Pliocene dispersal events to the western Mediterranean and North-African platforms and final, small-scale vicariance events within the genera in the Pleistocene.”

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28 September 2018

Mejías J. A., Chambouleyron M., Kim S.-H., Infante M. D., Kim S.-C. & Léger J.-F. 2018: Phylogenetic and morphological analysis of a new cliff-dwelling species reveals a remnant ancestral diversity and evolutionary parallelism in Sonchus (Asteraceae). – Pl. Syst. Evol. 304: 1023–1040.

Abstract:
“We describe a new cliff-dwelling species within Sonchus (Asteraceae): Sonchus boulosii and analyze its systematic position and evolutionary significance; in addition, we provide a key to the species of Sonchus in Morocco. Both morphological and ecological characteristics suggest a close relationship of S. boulosii with taxa of section Pustulati. However, ITS nrDNA and cpDNA matK markers indicate its uncertain position within the genus, but clear genetic differentiation from the remaining major clades. ITS phylogenetic trees show that likely evolutionary shifts to rocky habitat took place at least five times within genus Sonchus and that sect. Pustulati and S. boulosii clades have a clearly independent evolutionary origin. We postulate that the strong resemblance of S. boulosii to other rocky species reflects a phenomenon of homoplasy, probably driven by parallel evolutionary adaptations to the severe ecological constraints of its cliff face habitat. Therefore, a new section is also described, which includes S. boulosii as its sole representative: section Pulvinati. According to phylogenetic trees, the new clade may share its common ancestor with the clade comprising sections Maritimi and Arvenses, from which it is widely divergent in morphology and ecology, with the exception of Sonchus novae-zelandiae. However, the latter is a derived taxon, with high level of polyploidy unlike S. boulosii that shows 2n = 18, basal chromosome number of the genus. Since sections Pulvinati and Pustulati seem to be quite old in Sonchus, we also hypothesize that some similarities, such as fruit morphology, may reflect the persistence of some primitive characteristics.”

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28 September 2018

Gálan de Mera A., Linares Perea E., Montoya Quino J., Torres Marquina I. & Orellana J. A. V. 2018: Novedades corológicas de Taraxacum F. H. Wigg. (Asteraceae) para la flora de Argentina, Colombia y Perú. – Acta Bot. Malac. 43: 1-7.

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17 September 2018

Kalmuk N. A., Inceer H. & Immamoglu K. V. 2018: Achene micromorphology of 26 Crepis L. (Asteraceae) taxa from Turkey with notes on its systematic and ecological significance. – Bot. Lett. 165: 292–306.

Abstract:
“In this study, achene surface sculpturing and pappus ultrastructure of 26 Crepis taxa from Turkey were investigated using scanning electron microscopy (SEM). The achene microcharacters in the studied taxa were described here for the first time. Considerable differences in the shape of the epidermal cells and the ornamentation type of the outer cell wall have been found at interspecific levels. The differences in the achene surface sculpturing are also associated with achene dimorphism and habitat in some taxa. There are remarkable differences in the shape of the epidermal cells on the ribs of the achene among some clades within Crepis. The pappus ultrastructure is similar in all the taxa and is composed of spiky cells. Statistically significant difference has been found in the diameter of the pappus bristles among the taxa. It is concluded that achene micromorphology is useful for delimitation of the Crepis taxa. The microsculpture patterns on the ribs of the achene can also be used as a marker among major phylogenetic lineages as well as between closely related species. Additionally, the achene surface sculpturing could play an important role in the colonization of new habitats as well as in the adaptation to higher altitudes.”

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5 September 2018

Liu Y., Chen Y.-S. & Boufford D. E. 2018: Faberia pinnatifida (Asteraceae; Cichorieae), a new species from Sichuan, China. – Syst. Bot. 43: 316–324.

Abstract:
Faberia pinnatifida (Asteraceae; Cichorieae), a species occurring at high altitudes in Muli and Yanyuan Xian, Sichuan, China, is described as new based on morphological, palynological, andmolecular phylogenetic data. The ITS data indicate that F. pinnatifida is closely related to F. glaucescens and F. thibetica, but it is easily distinguished from F. glaucescens by its scapigerous stem with only one or two leaves, and from F. thibetica in its much taller stature and elliptic to oblanceolate leaf blade. Faberia pinnatifida somewhat resembles F. ceterach in the scapigerous stem and pinnatifid leaves, but readily differs in its corymbiform synflorescence and nodding capitula bearing ca. 30 florets.”

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27 August 2018

Jones K. E., Schilling E. E., Dias E. F. & Kilian N. 2018: Northern Hemisphere disjunctions in Lactuca (Cichorieae, Asteraceae): independent Eurasia to North America migrations and allopolyploidization. – Willdenowia 48: 259–284.

Abstract:
“The Lactuca lineage is one of nine lineages in the lettuce subtribe (Cichorieae, Asteraceae) distributed in Europe, Africa, Asia and North America. Within the Lactuca lineage two clades show disjunct Eurasian-North American distributions. One disjunct clade consists of diploids (x = 8) and allotetraploids (x = 17), the former restricted to Eurasia and the latter to North America and the Azores. In contrast, members of the other Eurasian-North American disjunct clade are all diploid (x = 9), like the remainder of the Lactuca lineage (diploid, x = 8 or 9). The aims of the present study were to investigate the migration pathways that led to the disjunct distributions of these two Eurasian-North American clades and the potential progenitors of the allopolyploid taxa. We conducted deep taxon sampling and multi-locus phylogenetic analyses using nuclear ribosomal DNA (ETS and ITS), a low-copy nuclear marker (A44) and five non-coding plastid markers. Divergence time estimations with BEAST and ancestral biogeographic estimations with BioGeoBEARS suggested that both lineages reached North America by the late Miocene. Cloning of the A44 region revealed two sequence copies within allopolyploid individuals that were resolved in divergent clades and this helped to identify potential progenitors. We provide competing hypotheses for the progenitor species and biogeographic pathways that gave rise to the allotetraploid lineage, and we propose a North American origin for the Azorean endemic. Taxonomic conclusions include L. graminifolia var. mexicana being raised to specific rank with the name L. brachyrrhyncha and the alleged endemic L. jamaicensis in fact represents the SE Asian L. indica, introduced to Jamaica.”

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22 August 2018

Wellard B. & Baker J. 2018: Stephanomeria occultata (Asteraceae: Cichorieae), a new species of wirelettuce from northern Utah, and a key to all perennial wirelettuce. – Syst. Bot. 43: 595–601.

Abstract:
Stephanomeria occultata, a new diploid (2n = 16) species of wirelettuce endemic to the Weber River drainage of northern Utah, is herein described, and a key to all perennial members of the genus is provided. The populations of S. occultata occur in unstable gravelly slopes in close proximity to the Weber River between 590–1650min elevation. Stephanomeria occultata is characterized from other species in the region by its large growth habit, which is up to 1mtall, numerous stems, well-developed tomentose leaves, and large number of ray florets (8–14). Information on habitat, ecology, distribution, taxonomic relationships, conservation, as well as maps, photographs, and illustrations are provided. The two populations of S. occultata may contain as few as 200 genets with up to 500 ramets and these small populations are vulnerable to encroaching weeds and anthropogenic disturbance.”

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15 August 2018

Maity D. & Dey S. K. 2018: Rediscovery of Melanoseris bracteata (Hook. f. & Thomson ex C.B. Clarke) N. Kilian (Asteraceae) in India with its nomenclatural notes and lectotypification of its basionym. – Pleione 12: 59–65.

Abstract:
Lactuca bracteata Hook.f. & Thomson ex C.B. Clarke, presently treated as Melanoseris bracteata (Hook.f. & Thomson ex C.B. Clarke) N. Kilian of Cichorieae–Asteraceae was described based on multiple specimens collected from Lachung valley of Sikkim Himalaya. Typification of Lactuca bracteata Hook.f. & Thomson ex C.B. Clarke is analyzed and the name is lectotypified following provisions of the present Code of nomenclature. Status of Melanoseris bracteata Hook. f. & Thomson is discussed. In India this species is rediscovered after 107 years from Lachen valley of Sikkim. Detailed description, field photographs, illustration, notes on distribution and ecology are provided. Its IUCN threat status in India is also proposed based on the present observation.”

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9 August 2018

Conti F. 2018: A new combination in Leontodon (Asteraceae, Cichorieae). – Phytotaxa 360: 287–291.

Abstract:
“A new species-level combination, Leontodon albanicus comb. & stat. nov., is proposed on the basis of a subspecies described from Albania. The species is reported here as new to Greece. The variability of the taxon has been examined and a new morphological description has been provided. Its relationship with the closest taxa is also discussed.”

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9 August 2018

Vukojević D., Mitić Z. S. & Zlatković B. 2018: Morphological variability of Tragopogon pterodes Pančić ex Petrović achenes: taxonomic evaluation of heterocarpy. – Pl. Biosystems 152: 937-944.

Abstract:
“This study presents the carpological heterogeneity of Tragopogon pterodes, an endemic plant species from Balkan Peninsula. The goal of this paper was to determine the variability of morphological characters of achenes and assess the degree of their morphological differentiation relative to the position they occupy in the receptacle. Analysis included four different populations of T. pterodes and examination of 18 (8 qualitative and 10 quantitative) characters of achenes in total. Data analysis employed basic statistic, univariate (ANOVA, Tukey HSD) and multivariate (CDA, CA) analyses to check the level of heterocarpy in this species. The results indicate possible morphological differentiation of three groups of achenes (outer, median and inner achenes), depending of their position on the receptacle. The members of all three types were described, illustrated and compared. The variability of investigated carpological characters in this species is providing important information prior to their further taxonomic treatment.”

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9 August 2018

Gültepe M., Makbul S., Okur S. & Coşkunçelebi K. 2018: Contribution to the pollen morphology of Tragopogon (Asteraceae) in Turkey. – Phytotaxa 361: 168-182.

Abstract:
“The pollen morphology of 25 Tragopogon L. taxa (including four subspecies and four varieties) distributed in Turkey was studied under light and scanning electron microscopy. It was observed that pollen grains of the examined Tragopogon taxa are suboblate and oblate-spheroidal in shape, and 3-zonocolpororate with fifteen lacunae. The lenghts of the polar axes and equatorial axes range from 31.57 to 40.35 µm and 35.32 to 44.65 µm, respectively. Numerical analyses show that the length of equatorial axis and the pore length are the most valuable characters among nineteen palynological traits for separating the examined taxa. The general palynological characteristics of the examined taxa allow some taxonomical evaluations for the genus. However, the results of cluster and principal component analyses did not support the division of the genus at any subgeneric level; neither did the ligule colour, as reported in the literature.”

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9 August 2018

Marrelli M., Conforti F., Araniti F., Casacchia T. & Statti G. 2018: Seasonal and environmental variability of non-cultivated edible Cichorioideae (Asteraceae). – Pl. Biosystems 152: 759-766.

Abstract:
“The need for a healthy diet and a renewed interest towards the rediscovery of old culinary traditions has determined a new attention to alimurgic plants. The aim of this work was to evaluate chemical and biological variability in relation to harvest time and site of collection of three wild edible Cichorioideae (Asteraceae) belonging to Calabrian folk tradition: Cichorium intybus L., Sonchus asper L. and Picris hieracioides L. Twelve hydroalcoholic extracts were prepared and evaluated for their total phenolic and flavonoid content. In vitro biological activity was assessed by means of DPPH and β-carotene bleaching test. The abundance of phenolics was significantly affected by the month of collection, being samples collected on November richer in phenolic compounds, and by the site of collection, as samples from lower altitude showed the highest content. The same samples showed also the highest radical scavenging activity. Also the ability to inhibit lipid peroxidation was influenced, being samples collected at lower altitude in November the most active ones. Within the framework of a valorisation of wild edible plant species, this work evidenced that harvest time and site of collection significantly affected phytochemical content and biological activity of investigated species.”

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29 June 2018

Yin Z.-J., Kilian N., Li B.-Z., Sun H.-Y., Zhao M.-X. & Wang Z.-H. 2018: A new species of Melanoseris (Lactucinae, Cichorieae, Asteraceae) from SW Xizang, China, based on morphological and molecular data. – Phytotaxa 357: 189–197.

Abstract:
Melanoseris jilongensis from SW Xizang, China, is described as a species new to science and illustrated, and its threat status is also assessed. It morphologically resembles M. macrorhiza, but differs in particular in leaf morphology, indumentum and achene characters. Molecular phylogenetic analysis based on nrITS and plastid DNA sequences revealed discordance between both DNA datasets as well as between morphological similarity and phylogenetic position. As in other cases of Sino-Himalayan taxa of the Melanoseris lineage, an event of reticulation in the speciation of M. jilongensis seems to have been taken place.”

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22 June 2018

Szeląg Z. 2018: Hieracia balcanica XV. Taxonomic and nomenclatural notes on Hieracium pilosissimum and H. divaricatum, with remarks on the H. heldreichii aggregate (Asteraceae). – Phytotaxa 356: 81–90.

Abstract:
“The original material of Hieracium pilosissimum Friv. nom. illeg. is heterogeneous and includes the type of H. divaricatum. Contrary to previous opinions, Hieracium pilosissimum is found conspecific with H. olympicum, whereas H. divaricatum may have originated as the result of hybridization between H. petrovae and H. racemosum. Earlier confusion caused the misuse of the name H. sect. Pilosissima for hybridogenous taxa between principal species of H. sect. Pannosa and species belonging to other sections. Hieracium pilosissimum is lectotypified using a specimen held at W. Hieracium cappadocicum var. congestum is synonymised with H. cappadocicum. Hieracium olympicum var. jankae is synonymised with H. olympicum and lectotypified. Hieracium rumelicum is synonymised with H. divaricatum and lectotypified. Hieracium thessalum, as morphologically intermediate between H. pannosum s. lat. and H. sparsum, is excluded from the H. heldreichii aggregate and lectotypified.”

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6 June 2018

Lin N., Deng T., Moore M. J., Sun Y.-X., Huang X.-H., Sun W.-G., Luo D., Wang H.-C., Zhang J.-W. & Sun H. 2018: Phylogeography of Parasyncalathium souliei (Asteraceae) and its potential application in delimiting phylogeoregions in the Qinghai-Tibet Plateau (QTP)-Hengduan Mountains (HDM) hotspot. – Frontiers Genet. 9: 171.

Abstract:
“Biogeographic regionalization can help to better understand diversity in biogeography, conservation, and macroecology. Historical regionalization schemes typically focus on species distributions, often rarely considering the rich context that phylogeographic information can provide. We investigated whether phylogeographic data could help to delineate floristic regions in the Qinghai-Tibet Plateau (QTP)-Hengduan Mountains (HDM) region by analyzing phylogeographic structure in the herb Parasyncalathium souliei (Asteraceae). We sequenced the plastid psbA-trnH and trnL-rpl32 spacer regions for 417 individuals in 36 populations across the geographic range of the species. To estimate the phylogeographic history of this species, a series of population genetic, phylogenetic, molecular dating, and haplotype network analyses were conducted, as were tested for historical demographic expansions. Using occurrence data, species distribution modeling was used to estimate geographic distributions at three time points: the present, the Mid-Holocene and the Last Glacial Maximum. Significant phylogeographic structure was evident (NST> GST; P < 0.05) among the 37 haplotypes detected. Four major haplogroups were identified based on phylogenetic analyses. Private haplotypes were restricted to geographically distinct regions that generally corresponded to previously identified biogeographic subregions within the QTP-HDM region. Our results imply Pliocene-Pleistocene diversification of P. souliei and suggest that the species may have been geographically widespread early in its history. This study may provide valuable evidence for phylogeographic regionalization using chloroplast genetic data in a common, widespread endemic species from the QTP-HDM.”

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5 June 2018

Duwe V. K., Muller L. A. H., Reichel K. Zippel E., Borsch T. & Ismail S. A. 2018: Genetic structure and genetic diversity of the endangered grassland plant Crepis mollis (Jacq.) Asch. as a basis for conservation management in Germany. – Conservation Genet. 19: 527–543.

Abstract:
“Plant diversity is decreasing mainly through anthropogenic factors like habitat fragmentation, which lead to spatial separation of remaining populations and thereby affect genetic diversity and structure within species. Twenty populations of the threatened grassland species Crepis mollis were studied across Germany (578 individual plants) based on microsatellite genotyping. Genetic diversity was significantly higher in populations from the Alpine region than from the Central Uplands. Furthermore, genetic diversity was significantly positively correlated with population size. Despite smaller populations in the Uplands there were no signs of inbreeding. Genetic differentiation between populations was moderate (F ST = 0.09) and no isolation by distance was found. In contrast, large-scale spatial genetic structure showed a significant decrease of individual pairwise relatedness, which was higher than in random pairs up to 50 km. Bayesian analyses detected three genetic clusters consistent with two regions in the Uplands and an admixture group in the Alpine region. Despite the obvious spatial isolation of the currently known populations, the absence of significant isolation by distance combined together with moderate population differentiation indicates that drift rather than inter-population gene flow drives differentiation. The absence of inbreeding suggests that pollination is still effective, while seed dispersal by wind is likely to be impaired by discontinuous habitats. Our results underline the need for maintaining or improving habitat quality as the most important short term measure for C. mollis. For maintaining long-term viability, establishing stepping stone habitats or, where this is not possible, assisted gene flow needs to be considered.”

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8 May 2018

Szeląg Z. 2018: Hieracia balcanica XIV. Two new species in Hieracium sect. Cernua (Asteraceae) from Bulgaria. – Phytotaxa 348: 125-132.

Abstract:
“Two apomictic, polyploid (x=9) species in Hieracium sect. Cernua are described from Bulgaria, and illustrated with photos of the holotypes. These are H. gussevii (3x) from the Vitosha Mountains, which combines the morphological features of H.
sparsum and H. robustum, and H. vladimirovii (4x) from the Stara Planina Mountains, of presumably hybrid origin between H. cernuum and H. olympicum.

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23 March 2018

Güzel M. E., Kilian N., Gültepe M., Kandemır A. & Coşcunçuncelebı K. 2018: Contributions to the taxonomy of Lactuca (Asteraceae) in Turkey. – Turk. J. Bot. 42: 197–207.

Abstract:
“This paper presents new data on the diversity of Lactuca L. in Turkey based on recent collections made during revisional work. Lactuca leucoclada Rech.f. & Tuisl is newly recorded for Turkey, and for Lactuca viminea (L.) J.Presl. & C.Presl. and Lactuca quercina L., the presence of two distinct subspecies each in Turkey, L. viminea subsp. viminea and L. viminea subsp. ramosissima (All.) Arcang., and L. quercina subsp. quercina and L. quercina subsp. wilhemsiana (DC.) Feráková, respectively, are reported. The presence of Lactuca macrophylla (Willd.) A.Gray, so far only doubtfully reported from Turkey, is confirmed in the present study. Emended descriptions, type information, updated distribution maps, and microphotographs of the taxonomically important achene features are presented for the studied taxa.”

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23 March 2018

Ya J.-D., Cai J. & Zhang Q.-R.  2018: Two genera and five species newly recorded in China. – Turk. J. Bot. 42: 239-245.

Abstract:
“Two genera, Callipeltis Steven (Rubiaceae) and Acanthocephalus Kar. & Kir. (Asteraceae), together with five species, Callipeltis cucullaris (L.) DC., Acanthocephalus benthamianus Regel, Galium verticillatum Danthoine ex Lam. (Rubiaceae), Nonea turcomanica Popov (Boraginaceae), and Erysimum croceum Popov (Brassicaceae), are reported as new records to China.”

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22 March 2018

Di Gristina E., Gottschlich G. & Scafidi F. 2018: Hieracium jurassicum subsp. serrapretense (Asteraceae), a new hawkweed taxon from the Pollino National Park (southern Italy). – Phytotaxa 340: 186–190.

Abstract:
“A new hawkweed taxon endemic to the Pollino National Park (southern Italy), Hieracium jurassicum subsp. serrapretense, is described and illustrated. Information on its morphology, distribution, ecology and taxonomic relationship is provided.”

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22 March 2018

Hereward J. P., Werth J. A., Thornby D. F., Keenan M., Chauhan B. S. & Walter G. H. 2018: Complete chloroplast genome of glyphosate resistant Sonchus oleraceus L. from Australia, with notes on the small single copy (SSC) region orientation. – Mitochondrial DNA Part B 3(1): 363-364.

Abstract:
Sonchus oleraceus, common sowthistle, is an asteraceous weed in Australian agricultural systems and has recently developed resistance to glyphosate. We present the complete chloroplast sequence of S. oleracueus reconstructed from Illumina whole genome shotgun sequencing. This is the first complete chloroplast genome available for the genus Sonchus. The complete chloroplast sequence is 151,808 bp long. A Bayesian phylogeny of the chloroplast coding regions of the tribe Cichorieae (Asteraceae) is presented. The S. oleraceus chloroplast genome is deposited at GenBank under accession number MG87840.”

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15 March 2018

Schabelreiter D. & Gottschlich G. 2018: Hieracium diaphanoides subsp. chaucorum Gottschl. & Schabelr., eine neue Hieracium-Unterart aus dem nordwestdeutschen Tiefland. – Kochia 11: 37-42.

Abstract:
H. diaphanoides subsp. chaucorum, a new subspecies from the northwestern part of Germany (Lower Saxony) is described and illustrated.”

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2 March 2018

Belyayev A., Paštová L., Fehrer J., Josefiova J., Chrtek J & Mráz P. 2018: Mapping of Hieracium (Asteraceae) chromosomes with genus‑specific satDNA elements derived from next‑generation sequencing data. – Pl. Syst. Evol. 304: 387-396.

Abstract:
“The highly repetitive DNA fraction of the eukaryotic genome is considered a mobile, rapidly changing entity, thus reflecting trajectories of short-term evolutionary change. It consists of several large classes in which transposable elements and satellite DNA (satDNA) predominate. Despite a growing awareness of its structure and functional significance, the evolutionary dynamics of repetitive elements and, particularly, satDNA remain poorly characterized. Next-generation sequencing (NGS) has opened up new possibilities for high-throughput genome analysis. Here, we applied satDNA repeatome elements derived from NGS data as probes for fluorescence in situ hybridization to characterize the karyotypes of three diploid hawkweed species of the predominantly polyploid apomictic genus Hieracium, namely H. intybaceum, H. prenanthoides and H. alpinum. Three cluster-distributed, genus-specific satDNA elements that are not present in the sister genus Pilosella were identified; notably, one element spans the functional centromeres. Each of the investigated diploids possessed a species-specific assortment of detected repeats. Their utilization as molecular-cytogenetic markers, in combination with ribosomal DNA loci, allowed for the development of a system to identify the individual chromosomes of the Hieracium species, thus providing a basis for the future investigation of karyotype evolution in diploid hawkweeds and for exploring satDNA dynamics in hybrids and apomicts of allopolyploid origin.”

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26 February 2018

Dias E. F., Kilian, N., Silva L., Schaefer H., Carine M., Rudall P. J., Santos-Guerra A., Moura M. 2018: Phylogeography of the Macaronesian lettuce species Lactuca watsoniana and L. palmensis (Asteraceae). – Biochem. Genet. https://doi.org/10.1007/s10528-018-9847-8.

Abstract:
“The  phylogenetic  relationships  and  phylogeography  of  two  relatively rare Macaronesian Lactuca species, Lactuca  watsoniana (Azores) and L.  palmensis (Canary Islands), were, until this date, unclear. Karyological information of the Azorean species was also unknown. For this study, a chromosome count was performed and L. watsoniana showed 2n=34. A phylogenetic approach was used to clarify the relationships of the Azorean endemic L. watsoniana and the La Palma endemic L. palmensis within the subtribe Lactucinae. Maximum parsimony, Maximum likelihood and Bayesian analysis of a combined molecular dataset (ITS and four chloroplast DNA regions) and molecular clock analyses were performed with the Macaronesian Lactuca species, as well as a TCS haplotype network. The analyses revealed that L.  watsoniana and L.  palmensis belong to different subclades of the Lactuca clade. Lactuca  watsoniana showed a strongly supported phylogenetic relationship with North American species, while L. palmensis was closely related to L. tenerrima and L. inermis, from Europe and Africa. Lactuca watsoniana showed four  single-island  haplotypes.  A  divergence  time  estimation  of  the  Macaronesian lineages was used to examine island colonization pathways. Results obtained with BEAST suggest a divergence of L. palmensis and L. watsoniana clades c. 11 million years ago, L. watsoniana diverged from its North American sister species c. 3.8 million years ago and L. palmensis diverged from its sister L. tenerrima, c. 1.3 million years ago, probably originating from an African ancestral lineage which colonized the Canary Islands. Divergence analyses with *BEAST indicate a more recent divergence of the L. watsoniana crown, c. 0.9 million years ago. In the Azores colonization, in a stepping stone, east-to-west dispersal pattern, associated with geological events might explain the current distribution range of L. watsoniana.”

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13 February 2018

Mateo Sanz G. & Egido Mazuelas F. del 2018: Estudio monográfico sobre los Géneros Hieracium y Pilosella en España: con referencias a Portugal y los Pirineos franceses [Monographical study on the genera Hieracium and Pilosella in Spain: with reference to Portugal and the French Pyrenees]. – Monogr. Bot. Ibér. 20: 1-422. ISBN: 9788494588082.

"This is the first monograph for Spain of two complex composite genera, Hieracium and Pilosella. It presents dichotomous keys illustrated with photos of fresh leaves, as well as detailed descriptions, ecology, chorology and observations of taxonomic and nomenclatural types. All genera with anomalous reproduction are very complicated to reduce to typical species and any other type of infrageneric or infraspecific taxon. In Hieracium and Pilosella this difficulty reaches its maximum degree, given the enormous variability in reproductive strategies, the environments they colonize and the ability to generate intermediate strains between sections that are distant from each other. The methodological classification the authors have adopted is that of Nägeli & Peter extended by Zahn, without giving hybrid treatment to any of the recognized taxa. Its lack of use is not a negation of the hybrid character, but the uncertainty when distinguishing two situations morphologically that are as similar as hybrids and hybrid species kept apomictically (reproducting asexually). In addition, the authors always indicate parents for all possible hybrids or consolidated species of hybrid origin. This new work presents several substantial differences with the Flora Ibérica, for which the authors have written the synthesis of these two genera. This monograph is more detailed and has a much broader keys that allow determination of all the species considered (340 Hieracium and 72 Pilosella), while the Flora Ibérica is a generalist work where only keys are offered for the most essential, about a fifth of them.”

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26 January 2018

Çakılcıoğlu U., Yüce Babacan E. & Vitek E. 2018: Gundelia asperrima (Compositae) – a species endemic in Turkey. – Ann. Naturhist. Mus. Wien, B, 120: 241-245.

Abstract:
Gundelia asperrima (Trautv.) Çakılcıoğlu, Yüce & Vitek is a distinct taxon that merits the rank of species. The characters and the distribution are discussed.”

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26 January 2018

Vitek E. 2018: Gundelia microcephala (Compositae) – a taxon deserving rank of species. – Ann. Naturhist. Mus. Wien, B, 120: 233–239.

Abstract:
Gundelia tournefortii var. microcephala Bornmüller is a distinct taxon raised to the rank of species. Its distinguishing characters and distribution are discussed.”

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19 January 2018

Liveri E., Bareka P. & Kamari G. 2018: Taxonomic study on the Greek endemic genus Hymenonema (Asteraceae: Cichorieae), using morphological and karyological traits. – Willdenowia 48: 5–21.

Abstract:
Hymenonema is a Greek endemic genus consisting of two species, H. laconicum and H. graecum, occurring in the lowlands of S Peloponnisos and on most of the C Aegean islands, respectively. Morphological investigation of 20 gatherings covering the entire distribution range revealed clear morphological differences between the two species, mainly in pappus, achenes, anther tube, ligules and basal leaf characters. A corresponding emended identification key to the species is given. Karyological investigation of 11 accessions included karyotypes, idiograms and karyological indices for both species. Six karyomorphological parameters were also statistically analysed. Populations with intermediate morphological characters between the two species are recorded for the first time and their relationship with the typical two species is discussed. The geographical distribution of the genus is mapped and doubtful locations are commented on. The cytotaxonomic data and the geographical distribution of the species support the characterization of H. laconicum and H. graecum as schizoendemics. The conservation status of both species is suggested as Vulnerable (VU) according to IUCN criteria.”

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