New Literature

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

Not all members of the International Cichorieae Network do have access to botanical libraries. As a service we would like to point to recent publications regarding Cichorieae. However, some articles will escape our attention. Therefore, your hints to recent publications are always welcome. 

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23 September 2019

Chen Y.-S., Xu L.-S. & Ke R. 2019: Nabalus muliensis (Asteraceae, Cichorieae), a new species from China. – Phytotaxa 416: 257–262.

Abstract:
Nabalus muliensis (Asteraceae, Cichorieae), a new species from southwestern Sichuan, China, is described and illustrated. It is the third species of Nabalus occurring in China. The new species is similar to Nabalus tatarinowii in its paniculiform inflorescence, nodding capitula, 3–5 florets, cylindric involucre, achene with unequal ribs and pale brown pappus, but differs by its yellow florets (vs. purple, white or pink), leaf blade lyrate-pinnatilobate (vs. divided with 1–3 pairs of lobes),
and achenes with a 2–3 mm long beak (vs. apex truncate). The new species is considered Endangered (EN) according to the IUCN Red List Categories and Criteria.”


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23 September 2019

Björk C. R. 2019: Overlooked diversity in exotic Taraxacum in British Columbia, Canada. – Botany 97: 329–346.

Abstract:
“In almost all North American literature, including in British Columbia, weedy Taraxacum species have been named as Taraxacum officinale F.H.Wigg and Taraxacum erythrospermum Andrz. ex Besser (or Taraxacum laevigatum DC.). This coarse taxonomic approach ignores great diversity in morphology, ecology, and geographical distributions among the exotic established species. Taxonomic refinement would facilitate floristics and ecological studies when exotic Taraxacum species are involved, and the taxonomy of native Taraxacum must first determine which are and which are not native species, which in turn requires knowledge of sectional identity of any specimen. Exotic Taraxacum specimens were identified to species and taxonomic sections using refined species and sectional concepts that align with taxonomic standards used in the native ranges of the species in Europe. Seven exotic sections and one informally named group are found to be present in British Columbia (Borea, Boreigena, Celtica, Erythrosperma, Hamata, Naevosa, Taraxacum, and the Taraxacum fulvicarpum group). The number of exotic Taraxacum species known to occur in British Columbia to date exceeds 100. A key to the exotic sections of British Columbia Taraxacum is presented and the sections are characterized. Species known to date are listed by their sectional placement. Notes are also presented on distinguishing native from exotic Taraxacum in British Columbia.”

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23 September 2019

Strother J. L. 2019: Sonchus tenerrimus (Asteraceae) in North America north of Mexico. – Madroño 66: 80–83.

Abstract:
“Some reports of Sonchus tenerrimus L. for North America north of Mexico, notably from Alabama and California, are based on misidentified specimens of S. oleraceus L.”

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23 August 2019

Urtubey E. 2019: Hieracium reitzianum (Asteraceae, Cichorieae), a new species from Brazil. – Novon 27: 140–143.

Abstract:
Hieracium reitzianum Cabrera ex Urtubey, a new species of Asteraceae from southeastern Brazil, is described and illustrated. This species is placed within Hieracium L. sect. Hypochaeridiformia (Arv.-Touv. ex Peter) Zahn (Hieracium subg. Chionoracium Sch. Bip.) by the presence of ciliate corolla lobes. It is most readily distinguished from other species of the section by having broadly obovate to suborbicular leaves with rounded to obtuse apices.”

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23 August 2019

Gonnelli V., Gottschlich G. & Zoccola A. 2019: Hieracium racemosum subsp. amideii (Asteraceae), a new hawkweed taxon from Montecristo island (Tuscan archipelago, Italy). – Phytotaxa 406: 294–300.

Abstract:
“A new hawkweed taxon endemic to the insula Montecristo (Tuscan archipelago, Italy), Hieracium racemosum subsp. amideii, is described and illustrated. Information on its distribution, ecology and taxonomic relationship is provided.”
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23 August 2019

Szeląg Z. 2019: Two new species in Hieracium sect. Alpina (Asteraceae) from the Eastern Carpathians in Poland. – Phytotaxa 406: 71–78.

Abstract:
“Two apomictic, polyploid (x=9) species in Hieracium sect. Alpina are described from the Western Bieszczady Mountains, Eastern Carpathians, Poland, and illustrated with photos of the holotypes. These are H. jasiewiczii (4x) which combines the morphological features of H. alpinum and H. bifidum, and H. wojcickii (4x) of presumably hybrid origin between H. alpinum and H. pseudobifidum. Both new species are probably relicts originated from diploid, sexual H. alpinum with a wider primary range covering also the Western Bieszczady Mountains, which presently occurs only in the Romanian and Ukrainian Carpathians.”
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23 August 2019

Szeląg Z. & Vladimirov V. 2019: The species intermediate between Hieracium petrovae and H. olympicum (Asteraceae): a treatment of H. kritschimanum and description of a new species from Greece. –  Phytotaxa 402: 107–113.

Abstract:
Hieracium kritschimanum is neotypified with specimens collected in the type locality in Bulgaria. The etymology and original spelling of the species epithet of H. kritschimanum are clarified. Hieracium pangaeum, which combines the morphological features of H. petrovae and H. olympicum, is described from northern Greece. Both species are illustrated with photos of herbarium specimens. A distribution map of H. petrovae, including its first records from Greece, is provided.”

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23 August 2019

Szeląg Z. 2019: Hieracia balcanica XVII. Hieracium wierzbickii (Asteraceae) a new hybridogenous species from Banat in Romania. – Phytotaxa 399: 279–284.

Abstract:
Hieracium wierzbickii, a new, apomictic, triploid (x = 9) species of presumably hybrid origin between sexual, diploid H. umbellatum and agamospermous, tetraploid H. wiesbaurianum subsp. herculanum, is described from Banat in Southern Romania, and illustrated by a photograph of the holotype. This is the first Hieracium species of the morphological formula H. umbellatum – H. wiesbaurianum.”

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23 August 2019

Orsenigo S., Galasso G. & Bonomi C. 2019: Typification of the name Hypochaeris facchiniana Ambrosi (Asteraceae). – Phytotaxa 391: 264–266.

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23 August 2019

Orsenigo S., Gottschlich G. & Galasso G. 2019: The typification and identity of Hieracium australe Fr. (Asteraceae). – Phytotaxa 388: 207–211.

Abstract:
“The name Hieracium australe Fr. (Asteraceae) is typified by specimens collected on the ancient walls of Sforza Castle in Milan (Italy) by Luigi Fenaroli in 1926 and distributed through the Flora Italica Exsiccata series under the name Hieracium australe Fr. subsp. mediolanense Fenaroli & Zahn. The identity and the taxonomic position of this neglected species is discussed.”

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17 July 2019

Shulha O. & Zidorn C. 2019: Sesquiterpene lactones and their precursors as chemosystematic markers in the tribe Cichorieae of the Asteraceae revisited: An update (2008–2017). – Phytochemistry 163: 149–177.

Abstract:
Ten years after the first overview on sesquiterpene lactones in the Cichorieae tribe of the Asteraceae family, we present an update. This review summarizes all chemosystematically relevant reports on sesquiterpene lactones and their immediate precursors from the Cichorieae (syn.: Lactuceae) tribe of the Asteraceae published between 2008 and 2017 and also includes some corrections to the 2008 review. The number of sesquiterpene lactones and sesquiterpenic acids as immediate precursor of sesquiterpene lactones reported for the Cichorieae has increased from 360 to 475 (+32%) within one decade. The number of known source species increased from 139 to 157 (+13%) and the number of chemosystematic reports (reported compounds per taxon) increased from 838 to 1241 (+48%). Notwithstanding this high interest in sesquiterpene lactones of the Cichorieae, still only from 30 out of 94 currently accepted genera within the Cichorieae at least one sesquiterpene lactone has been reported so far.”

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17 July 2019

Shulha O., Çiçek S. S., Wangensteen H., Kroes J., Mäder M., Girreser J., Jöhrer K., Greil R., Schühly W., Mangoni A., Grauso L., Thiel C. van, Zidorn C. 2019: Lignans and sesquiterpene lactones from Hypochaeris radicata subsp. neapolitana (Asteraceae, Cichorieae). – Phytochemistry 165: 112047.

Abstract:
“Four undescribed lignans and two undescribed sesquiterpenic acids, together with three known compounds (hypochoeroside C, hypochoeroside D, and 5-O-caffeoylshikimic acid) were isolated from the roots of Hypochaeris radicata subsp. neapolitana (Asteraceae, Cichorieae). The lignans were identified as 4-(3,4-dihydroxybenzyl)-2-(3,4-dihydroxyphenyl)tetrahydrofuran-3-carboxy-O-β-D-glucopyranoside, 4-(3,4-dihydroxybenzyl)-2-(3,4-dihydroxyphenyl)tetrahydrofuran-3-carboxy-O-β-D-glucopyranosyl-2′-O-methacrylate, (7S,8R,8′R)-7-(3,4-dihydroxyphenyl)-3′,4′-dihydroxy-7,8,7′,8′-tetrahydronaphtho [8,8′-c]furan-1(3H)-one, and (7S,8R,8′R)-7-(3,4-dihydroxyphenyl)-3′,4′-dihydroxy-8'-(hydroxymethyl)-7,8,7′,8′-tetrahydronaphthalen-8-carboxylic acid. The two sesquiterpenic acids were identified as the ring open precursors of hypochoerosides C and D. Structures were elucidated using NMR and HRMS. Absolute configurations of (7S,8R,8′R)-7-(3,4-dihydroxyphenyl)-3′,4′-dihydroxy-7,8,7′,8′-tetrahydronaphtho [8,8′-c]furan-1(3H)-one and (7S,8R,8′R)-7-(3,4-dihydroxyphenyl)-3′,4′-dihydroxy-8'-(hydroxymethyl)-7,8,7′,8′-tetrahydronaphthalen-8-carboxylic acid were determined using electronic circular dichroism (ECD) spectroscopy. 4-(3,4-dihydroxybenzyl)-2-(3,4-dihydroxyphenyl)tetrahydrofuran-3-carboxy-O-β-D-glucopyranoside was evaluated for its anti-proliferative activity against myeloma cell lines MM1S, U266, and NCI-H929 and showed cytotoxicity at 100 mM against MM1S strain. No neurotoxicity was observed for major compounds 4-(3,4-dihydroxybenzyl)-2-(3,4-dihydroxyphenyl)tetrahydrofuran-3-carboxy-O-β-D-glucopyranoside, hypochoeroside C, and hypochoeroside D in a fluorescence assay measuring neurite outgrowth in dorsal root ganglion (DRG) neurons. Additionally, compounds 4-(3,4-dihydroxybenzyl)-2-(3,4-dihydroxyphenyl)tetrahydrofuran-3-carboxy-O-β-D-glucopyranoside, hypochoeroside C, hypochoeroside D, and hypochoerosidic acid D were quantified in unstressed and drought-stressed plants using HPLC-DAD. Drought-stressed plants were found to contain lower concentrations of the lignan 4-(3,4-dihydroxybenzyl)-2-(3,4-dihydroxyphenyl)tetrahydrofuran-3-carboxy-O-β-D-glucopyranoside and sesquiterpene lactone hypochoeroside C.”

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17 July 2019

Zidorn C. 2019: Bioprospecting of plant natural products in Schleswig-Holstein (Germany) I: Chemodiversity of the Cichorieae tribe (Asteraceae) in Schleswig-Holstein. – Phytochem. Rev. https://doi.org/10.1007/s11101-019-09609-z

Abstract:
“Recent international developments make access to biological resources across international borders more difficult than in the past. Local access to biological resources, including plant natural products, thus becomes more important. In order to evaluate the opportunities to access bioactive natural products in our region, we here start a series of dedicated articles assessing the chemical diversity of plant taxa, native and naturalized, in the region of Schleswig-Holstein, Germany. The region has only a limited biodiversity with about 1500 species of higher plants growing in the wild. Our aims are the following: (1) A complete review of the natural products reported from taxa occurring in Schleswig-Holstein from any part of their distribution range. (2) Proof or disproof, whether these substances are also occurring in populations of the taxa at hand occurring in the wild in Schleswig-Holstein. (3) To establish analytical GLC-MS and/or HPLC-DAD-MS systems to identify and quantify these compounds. (4) Initiation of dedicated efforts to unravel the array of secondary metabolites contained in species from the Schleswig-Holstein region not yet investigated. (5) Search for chemically defined intraspecific taxa, i.e. chemically differing lineages of morphologically indistinguishable plant taxa, by comparing plants from Schleswig-Holstein with plants collected in other regions. The survey into the plant natural products’ chemodiversity of the flora of Schleswig-Holstein begins with a review of the natural products from Schleswig-Holstein members of the Cichorieae tribe of the Asteraceae family. The Cichorieae tribe of the Asteraceae family, which encompasses 94 genera and about 1500 species and innumerous microtaxa worldwide (Kilian et al. in Systematics, evolution and biogeography of the Compositae, IAPT, Vienna, ), is represented by only 17 genera in Schleswig-Holstein: Arnoseris, Chondrilla, Cicerbita, Cichorium, Crepis, Hieracium, Hypochaeris, Lactuca, Lapsana, Leontodon, Picris, Pilosella, Scorzonera, Scorzoneroides, Sonchus, Taraxacum, and Tragopogon. In total, 48 species (50 taxa including the two species with two distinct subspecies each in the region and treating the sections in the hyper-species-rich genus Taraxacum as species here), occur in Schleswig-Holstein. For all of the genera and all but six of the species (Hieracium fuscocinereum, Lactuca macrophylla, Sonchus palustris, and Taraxacum sections Celtica, Hamata, and Obliqua), the array of plant natural products has already been investigated to some degree. However, for only two taxa (Pilosella officinarum and Tragopogon pratensis subsp. minor) also plants from the region of Schleswig-Holstein have been studied and for only very few taxa, such as Cichorium intybus and Taraxacum officinale, all major classes of natural products have been investigated in detail so far.”

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12 July 2019

Mandel J. R., Dikow R. B., Siniscalchi C. M., Thapa R., Watson L. E. & Funk V. A. 2019: A fully resolved backbone phylogeny reveals numerous dispersals and explosive diversifications throughout the history of Asteraceae. – PNAS 116: 14083–14088.

Abstract:
“The sunflower family, Asteraceae, comprises 10% of all flowering plant species and displays an incredible diversity of form. Asteraceae are clearly monophyletic, yet resolving phylogenetic relationships within the family has proven difficult, hindering our ability to understand its origin and diversification. Recent molecular clock dating has suggested a Cretaceous origin, but the lack of deep sampling of many genes and representative taxa from across the family has impeded the resolution of migration routes and diversifications that led to its global distribution and tremendous diversity. Here we use genomic data from 256 terminals to estimate evolutionary relationships, timing of diversification(s), and biogeographic patterns. Our study places the origin of Asteraceae at ∼83 MYA in the late Cretaceous and reveals that the family underwent a series of explosive radiations during the Eocene which were accompanied by accelerations in diversification rates. The lineages that gave rise to nearly 95% of extant species originated and began diversifying during the middle Eocene, coincident with the ensuing marked cooling during this period. Phylogenetic and biogeographic analyses support a South American origin of the family with subsequent dispersals into North America and then to Asia and Africa, later followed by multiple worldwide dispersals in many directions. The rapid mid-Eocene diversification is aligned with the biogeographic range shift to Africa where many of the modern-day tribes appear to have originated. Our robust phylogeny provides a framework for future studies aimed at understanding the role of the macroevolutionary patterns and processes that generated the enormous species diversity of Asteraceae.”

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12 July 2019

Safavi S. R. 2019: Scorzonera tomentosa L. (Asteraceae), a new record for the flora of Iran. – Iran. J. Bot. 25: 40-43.

Abstract:
Scorzonera tomentosa L. is reported for the first time from Iran, it has been collected from Kordestan, NW. of Iran.”

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12 July 2019

Dudáš M. 2019: Taraxacum sect. Erythrosperma in Slovakia. Part I. Addenda to distribution of Taraxacum cristatum. – Thaiszia 29: 51–59.

Abstract:
New distribution data of Taraxacum cristatum (T. scanicum group), described in the year 2005, in Slovakia were recorded. During the intensive study of Slovak dandelions in herbarium collections and field course, additional 22 localities were found. The species has been recorded in 17 phytogeographical districts up to now, with the highest frequency in the western and the southern part of the country, preferring dry and xerothermic steppe grasslands, pastures and dry meadows from the class Festuco-Brometea. The altitudinal maximum in Slovakia, in 668 m a. s. l. was recorded in the Strážovské vrchy Mts. on the top of Mt. Baba. The updated distribution map is attached.

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12 July 2019

Takemori A., Naiki A., Takakura K.-I., Kanaoka M. M., Nishida S. 2019: Comparison of mechanisms of reproductive interference in Taraxacum. – Ann. Bot. 123: 1017–1027.

Abstract:
“Background and Aims: Reproductive interference may reduce fitness of either of the involved species, with potentially important ecological and evolutionary consequences. Except for the effect of shared pollinators on reproductive success, however, mechanisms underlying reproductive interference have been little studied, even though the severity of its impact may depend on the specific mechanism. The aim of this study was therefore to explore the mechanisms of reproductive interference between Taraxacum japonicum (native to Japan) and Taraxacum officinale (alien).

Methods: In a field survey, the association between alien species density and seed set in T. japonicum, and whether pollinator behaviour indicated a preference for the alien, were examined. Effects of heterospecific pollen deposition were measured in a series of hand pollination experiments, including mixed pollination experiments in which the order of application of conspecific and heterospecific pollen was varied. Finally, to investigate hybridization frequency, the parentage of seedlings produced following natural, mixed or heterospecific pollination was compared.
Key Results: Alien species density did not negatively affect native seed set, nor did pollinators appear to have a preference for alien flowers. The hand pollination experiments showed that heterospecific pollen deposition adversely affected native seed set, especially when alien pollen was applied before conspecific pollen. No viable hybrids were found following natural pollination, which suggests that hybridization might be a rare event.
Conclusion:Among the examined mechanisms, heterospecific pollen deposition might have the largest deleterious effect on the native species. This effect is frequency dependent; thus, a positive feedback loop may cause the effect on the population dynamics to increase over time, with the result that the alien might eventually displace the native in a population. Effects of the examined mechanisms on population dynamics should be investigated further to improve understanding of the impact of reproductive interference on the structure of plant communities.”

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29 May 2019

Genç İ. & Fırat M. 2019: Karyological study of the genus Gundelia (Compositae) in Turkey. – Caryologia 72: 45–53.

Abstract:
“Karyotypes in 12 taxa of Gundelia are compared, based on Feulgen-stained somatic metaphase chromosomes. The karyotypes of G. anatolica, G. asperrima, G. cilicica, G. colemerikensis, G. dersim, G. glabra, G. komagenensis, G. mesopotamica, G. munzuriensis and G. vitekii are described for the first time. Karyological analyses indicate relationships among the species with respect to their asymmetry indices. All Gundelia species studied were diploid with 2n = 2x = 18 chromosomes. All karyotypes are symmetrical, consisting of metacentric and submetacentric chromosomes. The submetacentric chromosomes of all the investigated specimens contain a secondary constriction. Three chromosome types were identified according to the position of the secondary constrictions. The chromosomes ranged in size from 2.00 μm to 7.02 μm. The total haploid chromosome length (THL) varied from 24.97 μm (G. asperrima) to 42.56 μm (G. rosea). To determine the karyological relationships among taxa, PCoA (Principal Coordinate Analysis) with six uncorrelated parameters was performed.”

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17 May 2019

Gottschlich G. 2019: Taxonomische und nomenklatorische Änderungen in der Gattung Hieracium für die Neuauflage der "Exkursionflora für Österreich und die gesamten Ostalpen". – Neilreichia 10: 53–68

Abstract:
“Results of preliminary studies on taxonomy and nomenclature of Hieracium (Asteraceae) relating to the next edition of the "Excursion Flora for Austria and all the Eastern Alps" are presented: Hieracium clusii is recognized at specific rank; H. tephrosoma s. lat. is divided into H. tephrosoma s. str. and H. kuekenthalianum; H. duronense is synonymized with H. antholzense; H. pseudinuloides is validated; four new subspecific combinations are made under H. atratum, H. balbisianum, H. cavillieri and H. inuloides; H. variifurcum is combined to Pilosella variifurca; the date of publication of H. cochleare is corrected; and 9 names are lectotypified.”

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17 May 2019

Gottschlich G. 2019: Bisher nicht bekannte oder berücksichtigte Nachweise von Hieracium- und Pilosella taxa in Austria ". – Neilreichia 10: 85–96.

Abstract:
“In preparation of the 4th edition of the "Flora for Austria and all the Eastern Alps", 41 records of Pilosella and Hieracium taxa are published that were not yet known in a federal state of Austria or not considered in the last edition of the excursion flora: Pilosella amaurocephala is new for Austria, 28 records are new for a federal state and 12 records are verifications of rare or old records.”

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9 May 2019

Cho M.-S., Yang J. Y., Yang T.-J. & Kim S.-C. 2019: Evolutionary comparison of the chloroplast genome in the woody Sonchus alliance (Asteraceae) on the Canary Islands. – Genes 10(3): 217.

Abstract:
“The woody Sonchus alliance consists primarily of woody species of the genus Sonchus (subgenus Dendrosonchus; family Asteraceae). Most members of the alliance are endemic to the oceanic archipelagos in the phytogeographic region of Macaronesia. They display extensive morphological, ecological, and anatomical diversity, likely caused by the diverse habitats on islands and rapid adaptive radiation. As a premier example of adaptive radiation and insular woodiness of species endemic to oceanic islands, the alliance has been the subject of intensive evolutionary studies. While phylogenetic studies suggested that it is monophyletic and its major lineages radiated rapidly early in the evolutionary history of this group, genetic mechanisms of speciation and genomic evolution within the alliance remain to be investigated. We first attempted to address chloroplast (cp) genome evolution by conducting comparative genomic analysis of three representative endemic species (Sonchus acaulis, Sonchus canariensis, and Sonchus webbii) from the Canary Islands. Despite extensive morphological, anatomical, and ecological differences among them, their cp genomes were highly conserved in gene order and content, ranging from 152,071 to 152,194 bp in total length. The number of repeat variations and six highly variable regions were identified as valuable molecular markers. Phylogenetic analysis of 32 species in the family Asteraceae revealed the phylogenetic position of the woody Sonchus alliance within the tribe Cichorieae and the sister relationship between the weedy Sonchus oleraceus and the alliance.”

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3 May 2019

Kashin A. S. Petrova N. A., Shanzer I. A., Kondratyeva A. O., Shilova I. V. & Parkhomenko A. S. 2018: Изменчивость морфологических параметров некоторых таксонов Chondrilla (Asteraceae) европейской России связи с их систематикoй [Variability of morphological parameters of some Chondrilla (Asteraceae) taxa in European Russia in context of their taxonomy]. – Bot. Zhurn. 103: 1407–1436. DOI: 10.1134/S0006813618110030

Abstract:
The StarPlot pictogram method and the dispersion analysis of the limits of 33 morphological parameters were used to examine the specimens of 46 population samples of 8 Chondrilla taxa in the European Russia. The analysis has made it possible to single out primary qualitative and quantitative characteristics that differentiate taxa within the genus Chondrilla. The research points to the drastic distinction of C. ambigua from the other taxa in terms of the majority of the applied differentiating characteristics. C. laticoronata and C. brevirostris are distinguished as well, though their distinctiveness is not so much pronounced. The analysis of intra- and interpopulation variability of the other taxa shows that most of the proposed qualitative and quantitative characteristics do not discriminate these taxa from one another. The morphological variability within Chondrilla populations was studied by means of the UPGMA and PCoA analyses to find out that C. ambigua is the only taxon clearly distinct morphologically. The morphological differences of C. juncea, C. latifolia, C. graminea, C. acantholepis and C. canescens are insignificant. The analysis shows that C. brevirostris and C. laticoronata form one group with C. juncea, C. canescens, C. latifolia, . graminea and C. acantholepis. It is concluded that the taxonomic structure of the genus Chondrilla in European Russia is not adequately represented in the Russian Floras (Leonova, 1964, 1989). Of 8 Chondrilla taxa found on this territory, only C. ambigua is morphologically distinct enough to deserve taxonomic recognition as a species. The status of C. brevirostris and C. laticoronata as two separate species is not so evident. The populations of C. juncea, C. latifolia, C. graminea, C. acantholepis and C. canescens are not morphologically distinguished, and are therefore to be treated as synonyms under the priority name.”
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30 April 2019

Crawford D.J., Moura M., Borges Silva L., Mort M. M. Kerbs B. Schaefer H. & Kelly J. K. 2019: The transition to selfing in Azorean Tolpis (Asteraceae). – Pl. Syst. Evol. 305: 305–317.

Abstract:
Asteraceae have the most endemic species of any flowering plant family in oceanic archipelagos, and these insular endemics display a higher frequency of self-compatibility (SC) compared to mainland composites. However, little attention has focused on the evolution of selfing in situ in islands. The genus Tolpis (Asteraceae) in the Macaronesian archipelagos consists predominantly of self-incompatible (SI) or pseudo-self-compatible plants, with one documented occurrence of the origin of self-compatibility (SC) in the Canary Islands. This study reports SC in two small populations of T. succulenta on Graciosa Island in the Azores. Progeny from the two populations exhibit high self-seed set. Segregation in F2 hybrids between SC and SI T. succulenta indicates that one major factor is associated with breeding system, with SC recessive to SI. Molecular phylogenetic analyses show that SC T. succulenta is sister to SI T. succulenta in the Azores, suggesting that SC originated from SI T. succulenta in the Azores. Plants on Graciosa are morphologically distinct from SI populations of T. succulenta on other islands in the Azorean archipelago, with smaller capitula and lower pollen-ovule ratios, both indicative of the selfing syndrome. The factors that may have favored selfing in these populations are discussed, as are the conservation implications of SC. Finally, the issue of whether the two SC populations are cryptic species worthy of taxonomic recognition is discussed.”

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11 March 2019

Urtubey E. & al. 2019: Systematics of Hypochaeris section Phanoderis (Asteraceae, Cichorieae). – Syst. Bot. Monogr. 106: 1–204.

Abstract:
“This revision treat the 41 South American species of Hypochaeris, plus the northwest African H. angustifolia, all now placed in a single monophyletic section Phanoderis. The New World species constitute subsection Phanoderis, and the single African species comprises subsection Africana. The species in South America represent a challenge in classification; molecular clock investigations suggest that the entire complex diverged approximately within the past 1 million years. From an ancestor in northwestern Africa, similar to the present-day H. angustifolia (the phylogenetic sister-species), have come 41 species in a relatively short geological time. These species are similar genetically; routine DNA sequencing with normal markers provides little differentiation. With Amplified Fragment Length Polymorphism (AFLP) analysis, distinct groups can be resolved, some with very strong statistical support other less so. Species arer morphologically reasonably well defined, but the differences are subtle, requiring field experience for accurate identification of taxa. ... Several new taxa and combinations are presented ...”

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11 March 2019

Uhlemann I., Eggert M., Schiemann J. & Thiele K. 2019: Zum Wiederanbau von Taraxacum koksaghyz (Asteraceae) als Kautschuklieferant in Deutschland. – Kochia 12: 19–35.

Abstract:
“Cultivation of diploid, sexual Taraxacum koksaghyz from Central Asia as rubber producer is re-established in Germany. The invasive capability of this species with regard to the native vegetation is extremely low, as shown in competition experiments in grassland and agricultural fields which led to a complete collapse of T. koksaghyz populations within one year. Hybridization events with native Taraxacum populations were not observed. The early stage of domestication of T. koksaghyz is characterized by an extraordinary morphological variability which is documented.”

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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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21 February 2019

Mráz P.,  Zdvořák P., Hartmann M., Štefánek M. & Chrtek J. 2019: Can obligate apomixis and more stable reproductive assurance explain the distributional successes of asexual triploids in Hieracium alpinum (Asteraceae)? – Pl. Biol. 21: 227–236.

Abstract:
“Although reproductive assurance has been suggested to be one of the most important factors shaping the differential distributional patterns between sexuals and asexuals (geographic parthenogenesis), it has only rarely been studied in natural populations of vascular plants with autonomous apomixis. Moreover, there are almost no data concerning the putative relationship between the level of apomictic versus sexual plant reproduction on one hand, and reproductive assurance on the other.

We assessed the level of sexual versus apomictic reproduction in diploid and triploid plants of Hieracium alpinum across its distributional range using flow cytometric analyses of seeds, and compared the level of potential and realized seed set, i.e. reproductive assurance, between the two cytotypes under field and greenhouse conditions.

Flow cytometric screening of embryos and endosperms of more than 4,100 seeds showed that diploids produced solely diploid progeny sexually, while triploids produced triploid progeny by obligate apomixis. Potential fruit set was much the same in diploids and triploids from the field and the greenhouse experiment. While in the pollination‐limited environment in the greenhouse apomictic triploids had considerably higher realized fruit set than sexual diploids, there was no significant difference between cytotypes under natural conditions. In addition, sexuals varied to a significantly larger extent in realized fruit set than asexuals under both natural and greenhouse conditions.

Our results indicate that triploid plants reproduce by obligate apomixis, assuring more stable and predictable fruit reproduction when compared to sexual diploids. This advantage could provide apomictic triploids with a superior colonisation ability, mirrored in a strong geographic parthenogenesis pattern observed in this species.”

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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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14 January 2019

Kim S.-H., Mejías J. A. & Kim S.-C. 2019: Next generation sequencing reveals the complete plastome sequence of newly discovered cliff-dwelling Sonchus boulosii (Asteraceae: Cichorieae) in Morocco. – Mitochondrial DNA Part B 4(1): 164-165.

Abstract:
The complete chloroplast genome sequences of newly discovered cliff-dwelling species of Sonchus, S. boulosii, were reported in this study. The S. boulosii plastome was 152,016 bp long, with the large single copy (LSC) region of 83,988 bp, the small single copy (SSC) region of 18,566 bp, and two inverted repeat (IR) regions of 24,731 bp. The plastome contained 130 genes, including 88 protein-coding, six ribosomal RNA, and 36 transfer RNA genes. The overall GC content was 31.2%. Phylogenetic analysis of 12 representative plastomes within the order Cichorieae suggests that S. boulosii is closely related to S. oleraceus.

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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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