Jun 14th, 2007
New Literature
Literature Archive: 2007 | 2008 | 2009 | 2010
Not all members of the International Cichorieae Network do have access to botanical libraries. As a service we would like to point to important recent publications regarding Cichorieae. However, some articles will escape our attention. Therefore, your hints to recent publications are always welcome.
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21 July 2010
Tomasz, I., Hasterok, R. & Szeląg, Z. (2010) : Cytogenetic analysis of Hieracium transylvanicum (Asteraceae). - Caryologia 63: 192-196.
Abstract:
“Hieracium transylvanicum is a relic species which occurs in refugial areas of south-eastern Europe. The structure of its karyotype, including determination of morphometric features of somatic metaphase chromosomes as well as the number and distribution of ribosomal DNA loci, was attempted using both classical chromosome staining and the FISH method with 25S rDNA and 5S rDNA probes. The cytotypes under study were collected from eight sites and did not vary signifi cantly in terms of their karyotype organisation. All 11 specimens had the same chromosome number, 2n=2x=18, and 9 similar chromosomal types, whose total length ranged from 4.62 to 2.64 μm. The karyotype of the species is highly symmetrical. Two chromosomal types, 3 and 6, have a 45S rDNA locus in distal parts of their short arms. In addition, the short arm of type 6 has interstitial 5S rDNA sequences. No intraspecifi c variation in number and chromosomal distribution of ribosomal DNA loci was observed. The very uniform structure of the karyotype of H. transylvanicum possibly refl ects the old phylogenetic age of this species.”
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8 July 2010
Maity, D. & Maiti, G. G. (2010) : Taxonomic delimitation of the genus Tibetoseris Sennikov and the new genus Pseudoyoungia of the Compositae - Cichorieae from Eastern Himalaya. - Compositae Newsletter 48: 22-42.
Abstract:
“The genus Tibetoseris Sennikov is circumscribed here as monotypic with the single species T. depressa (Hook. f. & Thomson) Sennikov, which was known as Crepis depressa Hook. f. & Thomson or Youngia depressa (Hook. f. & Thomson) Babc. & Stebbins. Its independent taxonomic status is explained and a new variety is recognized. The new genus Pseudoyoungia D. Maity & Maiti (Compositae - Cichorieae) is proposed based on the remaining nine species of Tibetoseris Sennikov kept under two sections including the typical one. New combinations are made for these nine species.”
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29 June 2010
Tyler, T., Bertilsson, A. & Aronson, M. (2010) : Hotade hökfibblor i södra Sverige - en preliminär rödlista. -Svensk Botanisk Tidskrift 104: 227-273.
Abstract:
“A preliminary Red List for south-Swedish Hieracium species. All (micro-)species of Hieracium sectt. Bifida, Hieracium and Vulgata confined to the southern half of Sweden have been assessed in accordance with the IUCN criteria. Of the 406 assessed species, 311 (77%) were found to meet the Red List criteria whereas the remaining 95 species were found to be Least Concern. An additional 172 species were referred to the category Not Applicable since they were either considered to be insuffiently known taxonomically (including all species known from a single site only) or have been introduced to Sweden after the year 1800.
The most important habitats fot the species concerned are fertile and herb-rich old-growth Picea abies forests, traditionally managed or moderately overgrown wooded meadows, and open secondary deciduous forests surrounding old settlements. The first habitat is very rapidly declining due to intense industrial forestry and the latter two gradually disappear due to overgrowth and forest plantation and the expansion of gardens and towns. Only few species have been able to exploit and establish stable populations in new habitats along roads and other ecotones.
The distribution and status of all species proposed for the Red List is both tabulated and commented upon. In addition, the extent and shortcomings of the existing data and the rationale for red-listing apomictic taxa are discussed.”
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29 June 2010
Mateo Sanz, G. & Egido Mazuelas del, F. (2010) : Especies nuevas del género Hieracium L. (Compositae) en la provincia de León, II. - Flora Montiberica 45: 42-53.
Abstract:
“Several new species of Hieracium (Compositae) found in the province of León are here commented or described as new.”
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27 May 2010
Mártonfiová, L., Mártonfi, P. & Šuvada, R. (2010) : Breeding behavior and its possible consequences for gene flow in Taraxacum sect. Erythrosperma (H. Lindb.) Dahlst. - Plant Species Biology 25: 93-102. doi: 10.1111/j.1442-1984.2010.00270.x
Abstract:
“Studies of pollen, seed set and experimental hybridizations were carried out to clarify breeding behavior and gene flow pathways in Taraxacum sect. Erythrosperma. Seeds from hybridization (106 samples), open pollinated (34) and bagged (43) capitula were analyzed for breeding system using a flow–cytometric seed screen. In the section Erythrosperma, diploids are obligate sexuals, mostly allogamous; however, autogamy also occurs (in 28% of unpollinated capitula). Triploids are apomicts with residual sexuality (in 13% of capitula pollinated by pollen of diploids). Pollen of diploids in Taraxacum is usually approximately the same size (regular pollen). In our study, in the section Erythrosperma, many diploids (24%) produced pollen grains of different sizes (irregular pollen) and one plant produced no pollen. The pollen of triploids is either irregular (33%) or the triploids produce no pollen (67%). Consequently, the method of ploidy level assessment on the basis of pollen characteristics is not suitable for Taraxacum sect. Erythrosperma. Low potential for polyploid hybrid formation between diploid maternal plants and polyploid pollen donors, considerable tendency to autogamy and no evidence of the formation of diploid progeny by polyploid maternal plants (facultative apomixis) indicates low intensity of gene flow within Taraxacum sect. Erythrosperma. This, together with a lower population density and spatial isolation of ploidy levels, is expected to result in a lower rate of formation of new apomictic lineages. Thus, Taraxacum sect. Erythrosperma appears evolutionarily more stable and taxonomically less complicated than sect. Ruderalia. The present study supports the agamospecies concept of Taraxacum sect. Erythrosperma.”
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27 May 2010
Crawford, D. J., Archibald, J. K., Kelly, J. K., Mort, M. E. & Santos-Guerra, A. (2010) : Mixed mating in the ‘obligately outcrossing’ Tolpis (Asteraceae) of the Canary Islands. - Plant Species Biology 25: 114-119. doi: 10.1111/j.1442-1984.2010.00275.x
Abstract:
“The genus Tolpis is largely restricted to the Canary Islands, where all of the endemic species except one are self-incompatible perennials (as indicated by levels of selfed seed set). A recent study suggested that self-incompatibility is leaky in some populations (Crawford et al. 2008, Int. J. Plant Sci. 169: 782–791). In the present study, allozyme markers were used to examine the mating systems in eight populations of Tolpis from two different islands in the Canaries. Two of the eight populations yield t (outcrossing rate) estimates close to 0.5, indicating a mixed mating system. The other populations are predominately, although probably not exclusively, outcrossing. The results for Tolpis are relevant to the broader issue of the breeding systems of the colonizing ancestors of oceanic lineages because some self compatibility would allow one propagule from a generally self-incompatible outcrossing source population to set at least some seed from selfing. This, along with the typically higher genetic diversity of individuals from outcrossing populations, may have facilitated the radiation of Tolpis in the Canaries. The present results provide the first evidence for mixed mating in what has previously been interpreted to be an ‘obligately outcrossing’ island lineage. In a more general context, the present study suggests that more detailed investigations of the breeding systems of putatively obligate outcrossing species are needed to test some of the long-held assumptions that the results would invariably show high outcrossing.”
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7 May 2010
Mort, M. E., Crawford, D. J., Archibald, J. K., O’Leary, T. R. & Santos-Guerra, A. (2010) : Plant DNA barcoding: A test using Macaronesian taxa of Tolpis (Asteraceae). - Taxon 59: 581-587.
Abstract:
“Two combinations (designated as options 1 and 2) of four plastid markers (matK, rpoC1, rpoB, psbA-trnH) that have been recommended for DNA barcoding were tested for utility in a putatively recently-diversified group: the primarily Canarian clade within the genus Tolpis (Asteraceae). Prior studies had indicated very little molecular variation in the group, and thus it was used to determine whether accepted taxa, segregate species, and morphological variants ostensibly deserving taxonomic recognition could be distinguished employing regions proposed as useful for DNA barcoding. The regions, particularly option 2, separated all morphologically distinct species of Tolpis except one, and distinguished one segregate species and certain variants in a morphologically variable and intergrading group (comprising both the T. laciniata and T. lagopoda species complexes). The barcoding sequences also revealed several variants that are worthy of additional study in order to further understand the diversity of Tolpis in the Canary Islands.”
————————————————————————————————————————– 18 March 2010
Vitek, E., Fayvush, G., Tamanyan, K. & Gemeinholzer, B. (2010): New taxa of Gundelia (Compositae) from Armenia. - Annalen des Naturhistorischen Museums in Wien, B 111: 85-99.
Abstract:
“Two new taxa, Gundelia aragatsi and G. aragatsi ssp. steineri are described. Gundelia was mainly treated as monospecific genus - this status cannot be maintained. The differences of the new taxa, the status of a probable further new species, Gundelia sp. (Garni), and the important characters for future research are discussed.”
————————————————————————————————————————– 18 March 2010
Krahulcová, A., Vladimirov, V., Krahulec, F. & Bräutigam, S. (2009): The agamic complex of Pilosella (Asteraceae) in Bulgaria and SW Romania: variation in ploidy level and breeding systems. - Phytologia Balcanica 15: 377-384.
Abstract:
“Chromosome numbers and breeding systems are given for a set of Pilosella species occurring in Bulgaria and SW Romania (Banat). All diploids were found sexual, most of the polyploids apomictic.”
————————————————————————————————————————– 16 February 2010
Peruzzi, L. & Vangelisti, R. (2010): Considerazioni tassonomiche su Hyoseris taurina (Asteraceae) e sua presenza in Italia centrale. - Annali di Botanica (Roma), 2010, quaderni.
Abstract:
“Italian populations of H. radiata L. (a Mediterranean species) and H. taurina Martinoli (a C Mediterranean endemic) were morphologically and karyologically studied, then compared with H. lucida L. (from E Mediterranean) and H. frutescens Brullo & Pavone (endemic of Gozo, Malta Archipelago), aimed to verify the distinctiveness of all these related taxa. All studied populations resulted diploid with 2n = 16 chromosomes. We evidenced the close affinity of H. lucida, H. frutescens and H. taurina and on the contrary the specific distinction of these taxa from H. radiata, thanks to several morphological features. Accordingly, H. lucida subsp. taurina (Martinoli) Peruzzi & Vangelisti comb. nov. & H. lucida subsp. frutescens (Brullo & Pavone) Peruzzi & Vangelisti comb. nov. are proposed. Finally, the occurrence of H. lucida subsp. taurina in three Tuscan localities is evidenced, marking the northernmost limit of the species range.”
————————————————————————————————————————– 16 February 2010
Aquaro, G., Caparelli, K. F. & Peruzzi, L. (2009): The genus Taraxacum (Asteraceae) in Italy. II. Five new species of Taraxacum sect. Erythrocarpa. - Proceedings of IV Balkan Botanical Congress, Sofia.
Abstract:
“Taraxacum sect. Erythrocarpa is reported for the first time for Calabria (S Italy). After field, herbarium and laboratory studies, five new species belonging to that section are described as new to science: T. calabricum Aquaro, Caparelli & Peruzzi; T. cescae Aquaro, Caparelli & Peruzzi (2n = 32) - occurring also in C Italy; T. kirschneri Aquaro, Caparelli & Peruzzi (2n = 24); T. optimae Aquaro, Caparelli & Peruzzi and T. pollinense Aquaro, Caparelli & Peruzzi (2n = 32). Morphological, cytotaxonomical and distributional data are illustrated and discussed.”
————————————————————————————————————————– 15 February 2010
Mateo Sanz, G. & del Egido Mazuelas, F. (2009): Novedades del género Pilosella Hill (Compositae) en los montes Astur-Leoneses, II. - Flora Montiberica 44: 72-79.
Abstract:
“Several new species of Pilosella (Compositae) found in the provinces of León and Asturias (NW Spain) are here commented or described as new.”
————————————————————————————————————————– 4 February 2010
Urtubey, E., Stuessy, T. F. & Tremetsberger, K. (2009): Systematics of the South American Hypochaeris sessiliflora complex (Asteraceae, Cichorieae). – Annals of the Missouri Botanical Garden 96: 685-714. doi: 10.3417/2006136
Abstract:
“The Hypochaeris sessiliflora complex (Asteraceae, Cichorieae) consists of nine species of the genus from South America (all in section Achyrophorus Scop.) that have sessile or nearly sessile flowering heads surrounded by a rosette of leaves. They occur at 1430–5100 m in elevation along the Andean chain from Venezuela to Chile and Argentina. Two species, H. sessiliflora Kunth and H. meyeniana (Walp.) Benth. & Hook. f. ex Griseb., are extremely polymorphic, and they vary conspicuously in the shape of the external phyllaries and presence or absence of different types of trichomes. They have the widest distributions (Venezuela to central Peru, and Peru to northern Chile and northwestern Argentina, respectively), they flower throughout the year, and they also are primarily associated with dry and sunny habitats. Hypochaeris meyeniana is characterized by retrorsely pinnatifid leaves (rarely lobate) and slightly narrower cypselar apices. Hypochaeris hohenackeri (Sch. Bip.) Domke and H. taraxacoides Ball are glabrous, whereas H. acaulis (J. Rémy) Britton has scattered shaggy trichomes on the leaves; all three occur in humid places, such as seeps or bogs. Hypochaeris eriolaena (Sch. Bip.) Reiche and H. mucida Domke are pubescent, with long whiplike trichomes on leaves and phyllaries, giving a niveous-tomentose appearance. Hypochaeris echegarayi Hieron. (white corollas) and H. eremophila Cabrera (yellow corollas) are two related species with shaggy trichomes on the abaxial surfaces of the phyllaries, both with considerable ecological tolerance, that grow in dry as well as humid sites. Morphological cladistic analyses suggest a hypothesis of relationships within the complex. Surprisingly, H. acaulis from Chile and Argentina, although fitting morphologically within the H. sessiliflora complex, based on amplified fragment length polymorphism (AFLP) data, clearly does not seem to belong to this group. Instead, the species ties to H. palustris (Phil.) De Wild. and H. tenuifolia (Hook. & Arn.) Griseb., also from the southern Andes. The acaulescent habit of H. acaulis seems best interpreted as a parallel adaptation to survival at high elevations.”
————————————————————————————————————————– 21 January 2010
Gottschlich, G. (2009): New species of the genus Hieracium L. (Compositae) from the Northern Apennine (Italy). – Webbia 64: 175-186.
No English abstract given; the following species are described as new to science: H. cornuscalae, H. semicanescens, H. umbrosoides, H. lanudae, H. faucisjovis, H. torrigliense.
————————————————————————————————————————– 20 January 2010
Enke, N. (2009): Contributions towards a revised infrageneric classification of Crepis (Cichorieae, Compositae). – Willdenowia 39: 229-245. doi: 10.3372/wi.39.39202
Abstract:
“A recent molecular analysis of Crepis by Enke & Gemeinholzer based on ITS and matK sequences proved the genus to be polyphyletic and split into three statistically well supported clades. The first clade comprises the majority of the sampled species as Crepis s.str., the second clade species of five Crepis sections (Intybellia, Lagoseris, Phaecasium, Microcephalum and Pterotheca) as well as the genera Lapsana and Rhagadiolus, the third clade C. sect. Ixeridopsis as part of the Youngia group. The present paper summarises and discusses the available molecular, morphological (additional micromorphological data of pollen, achenes and pappus presented in the present paper) and karyological findings, makes suggestions towards delimitation and infrageneric classification of Crepis and specifies problems to be solved by future studies. It is concluded that (1) the recent resurrection of Askellia as a separate genus is well advised, (2) the genera Lapsana and Rhagadiolus should, for the time being, be maintained in their current generic circumscription and (3) Crepis, consequently, be treated as a paraphyletic taxon. A revised infrageneric classification of Crepis, maintaining 21 of Babcock’s 27 sections, some in a revised circumscription, is provided; in addition, C. sect. Calliopea is re-established and C. sect. Neglectoides is described as new to science. For several species or species groups the findings are ambiguous or contradicting and their placement questionable. Approximately 55 % of the species were not included in a molecular analysis yet and their sectional placement based on morphological data only is thus tentative.”
————————————————————————————————————————– 19 January 2010
Peruzzi, L., Aquaro, G., Caparelli, K. F. & Raimondo, F. M. (2009): The genus Taraxacum (Asteraceae) in Italy. III. A new species of T. sect. Erythrocarpa from Sicily. – Flora Mediterranea 19: 73-79.
Abstract:
“Taraxacum sect. Erythrocarpa is reported for the first time for Sicily. After field, herbarium and laboratory studies, a new species belonging to that section is described as new to science: T. garbarianum (2n = 32). Morphological, cytotaxonomical and distributional data are illustrated and discussed.”
————————————————————————————————————————– 19 January 2010
Bano, R. & Qaiser, M. (2009): A new species and a new combination of Prenanthes L., (Lactuceae - Asteraceae) from Pakistan and Kashmir. – Pakistan Journal of Botany 41: 2087-2091. http://www.pakbs.org/pjbot/PDFs/41(5)/PJB41(5)2087.pdf
Abstract:
“Prenanthes stewartii Roohi Bano & Qaiser, a new species from Kashmir is described and illustrated. A new combination viz., Prenanthes aitchisoniana (Beauv.) Roohi Bano & Qaiser, is proposed. Key to all the species found in Pakistan and Kashmir, belonging to the genus Prenanthes L., is also given.”
————————————————————————————————————————– 7 January 2010
Tyler, T. & Jönsson, J. (2009): Ploidy level analysis of apomictic Hieracium (Asteraceae) reveal unexpected patterns and variation. – Nordic Journal of Botany 27: 490-502. doi: 10.1111/j.1756-1051.2009.00476.x
Abstract:
“The DNA ploidy level of 673 accessions belonging to 238 species of Hieracium have been analyzed by flow cytometry. 222 of the species were of Scandinavian origin as members of the exclusively apomictic H. sectt. Bifida, Hieracium, Oreadea, Tridentata and Vulgata. For the overwhelming majority of the species, the ploidy level (or chromosome number) has never been investigated before. Approximately 50% of the Scandinavian species, previously believed to be exclusively triploid, were found to be tetraploid. In addition, two pentaploid samples, viz. H. intermarginatum Johanss. & Sam. from Sweden and H. cf. plumbeum Blytt & Fr. from Germany, were found. Although two or more accessions from geographically remote sites were analyzed for approximately 50% of the Scandinavian species, only 2 (<2%) taxonomically undisputed species were found to consist of plants with more than one ploidy level. An intriguing pattern was revealed among Scandinavian members of H. sectt. Bifida and Vulgata when ploidy level and morphometric variation was compared, viz. the most typical or extreme representatives of these sections were found to be exclusively triploid whereas tetraploids dominate among species with intermediate morphology and among species morphologically intermediate between these sections and H. sect. Hieracium. This pattern may indicate that the tetraploids, which tend to have mainly northern distributions, have originated as the result of rare sexual hybridizations between triploid members of different sections, plausibly during or after the northward migration of the parental linages after the last glaciation. The results are believed to be highly relevant for understanding the processes of evolution and speciation within the predominantly apomictic genus Hieracium, but it is emphazised that additional data from e.g. molecular markers and pollen viability analysis are needed before any trustworthy conclusions can be made as far as evolutionary processes are concerned.”
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