Jun 11th, 2009
Literature 2009
Literature Archive: 2007 | 2008 | 2009 | 2010 | 2011 | 2012
————————————————————————————————————————– 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.”
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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.”
————————————————————————————————————————- 30 December 2009
Fehrer, J., Krak, K. & Chrtek, J. (2009): Intra-individual polymorphism in diploid and apomictic polyploid hawkweeds (Hieracium, Lactuceae, Asteraceae): disentangling phylogenetic signal, reticulation, and noise. – BMC Evolutionary Biology 9: 239-261. doi: 10.1186/1471-2148-9-239
Abstract:
“Background
Hieracium s.str. is a complex species-rich group of perennial herbs composed of few sexual diploids and numerous apomictic polyploids. The existence of reticulation and the near-continuity of morphological characters across taxa seriously affect species determination, making Hieracium one of the best examples of a ‘botanist’s nightmare’. Consequently, its species relationships have not previously been addressed by molecular methods. Concentrating on the supposed major evolutionary units, we used nuclear ribosomal (ETS) and chloroplast (trnT-trnL) sequences in order to disentangle the phylogenetic relationships and to infer the origins of the polyploids.
Results
Despite relatively low interspecific variation, the nuclear data revealed the existence of two major groups roughly corresponding to species with a Western or Eastern European origin. Extensive reticulation was mainly inferred from the character additivity of parental ETS variants. Surprisingly, many diploid species were of hybrid origin whilst several polyploid taxa showed no evidence of reticulation. Intra-individual ETS sequence polymorphism generally exceeded interspecific variation and was either independent of, or additional to, additive patterns accounted for by hybrid origin. Several ETS ribotypes occurred in different hybrid taxa, but never as the only variant in any species analyzed.
Conclusion
The high level of intra-individual ETS polymorphism prevented straightforward phylogenetic analysis. Characterization of this variation as additive, shared informative, homoplasious, or unique made it possible to uncover the phylogenetic signal and to reveal the hybrid origin of 29 out of 60 accessions. Contrary to expectation, diploid sexuals and polyploid apomicts did not differ in their molecular patterns. The basic division of the genus into two major clades had not previously been intimated on morphological grounds. Both major groups are thought to have survived in different glacial refugia and to have hybridized as a result of secondary contact. Several lines of evidence suggest the data is best explained by the presence of an extinct range of variation and a larger diversity of ancestral diploids in former times rather than by unsampled variation. Extinct diversity and extensive reticulation are thought to have largely obscured the species relationships. Our study illustrates how multigene sequences can be used to disentangle the evolutionary history of agamic complexes or similarly difficult datasets.”
————————————————————————————————————————- 22 December 2009
Gottschlich, G. (2009): Typenmaterial der Gattung Hieracium L. (Compositae) in den botanischen Sammlungen des Tiroler Landesmuseums Ferdinandeum, Innsbruck (IBF). – Wissenschaftliches Jahrbuch der Tiroler Landesmuseen 2: 88-109.
Abstract:
“Within the framework of a revision of the historical collections of Hieracium specimens of the herbarium IBF 37 type specimens could be found out. In case that a lectotypification not has been made and if the condition of preservation allowed it, these type specimens are chosen as lectotypes. ”
————————————————————————————————————————- 22 December 2009
Gottschlich, G. (2009): The Hieracium collection in the Florentine Herbarium and its taxonomical importance. – Pp. 197: in Raffaelli, M. (ed.), The Museum of Natural History of the University of Florence, Volume II - the botanical collections. – Firenze.
————————————————————————————————————————- 26 October 2009
Kilian, N., Gemeinholzer, B. & Lack, H. W. (2009): Cichorieae. – Pp. 343-383
in: Funk, V. A., Susanna, A., Stuessy, T. E. & Bayer, R. J. (ed.), Systematics, evolution and biogeography of Compositae. – Vienna: IAPT.
————————————————————————————————————————- 19 October 2009
Krahulcová, A., Rotreklová, O., Krahulec, F., Rosenbaumová, R. & Plačková, I. (2009): Enriching ploidy level diversity: the role of apomictic and sexual biotypes of Hieracium subgen. Pilosella (Asteraceae) that coexist in polyploid populations. – Folia Geobotanica 44: 281-306. doi: 10.1007/s12224-009-9041-1
Abstract:
“The capacity to generate variation in ploidy and reproductive mode was compared in facultatively apomictic versus sexual maternal plants that coexist in two model populations. The population structure was studied in polyploid hybrid swarms comprised of Hieracium pilosella (usually sexual, less commonly apomictic), H. bauhini (apomictic), and their hybrids (sexual, apomictic, or sterile). Relationships among established biotypes were proposed on the basis of their DNA ploidy level/chromosome number, reproductive mode and morphology. Isozyme phenotypes and chloroplast DNA haplotypes were assayed in the population that was richer in hybrids. The reproductive origin of seed progeny was identified in both sexual and apomictic mothers, using alternative methods: the karyological, morphological and reproductive characters of the cultivated progeny were compared with those of respective mothers, or flow cytometric seed screening was used. In both populations, the progeny of sexual mothers mainly retained a rather narrow range of ploidy level/chromosome number, while the progeny of facultatively apomictic mothers was more variable. The high-polyploid hybrids, which had arisen from the fertilization of unreduced egg cells of apomicts, mainly produced aberrant non-maternal progeny (either sexually and/or via haploid parthenogenesis). Apparently, such versatile reproduction resulted in genomic instability of the recently formed high-polyploid hybrids. While the progeny produced by both true apomictic and sexual mothers mostly maintained the maternal reproductive mode, the progeny of those ‘versatile’ mothers was mainly sexual. Herein, we argue that polyploid facultative apomicts can considerably increase population diversity.”
————————————————————————————————————————- 19 October 2009
Tyler, T. & Bertilsson, A. (2009): Hieracium (Asteraceae) of sub-alpine Dalarna, Sweden, revisited: decline in species richness attributable to both forestry and overgrowth. – Nordic Journal of Botany 27: 419-424. doi: 10.1111/j.1756-1051.2009.00392.x
Abstract:
“The Hieracium flora of westernmost Dalarna, comprising the southern fringe of the Scandes alps (central Scandinavia), is extremely rich in species. The area is dominated by species-poor coniferous sub-alpine and taiga forest, but within this matrix there are small and isolated sites with high species richness of both Hieracium and other plants. Both steep mountain slopes with outcrops of base-rich bedrock and moving ground water, and old seasonal or permanant human settlements constitute such biodiversity hotspots. However, today the former are threatened by modern forestry practices and/or exploitation for winter tourism and the latter are commonly abandoned and subjected to severe overgrowth or dramatically changed land-use. The area was thorougly surveyed in 1897–1921. In 2007, the same region and partly the same sites, were revisited. In 1897–1921, 15 Hieracium species were on average recorded from each site, but when the same sites were revisited in 2007 significantly fewer, only about 6 (40%) species per site, were refound. As far as the total species pool of the study area is concerned, it consisted of 168 species in 1897–1921, whereof only 117 (67%) were found in 2007. This remarkable reduction in species richness at both the local and the regional scale is attributable to both modern forestry practices and to the cessation of traditional agricultural practices like hay-making on semi-natural grasslands and extensive cattle-grazing in the forests. It is concluded that to reduce the on-going severe loss of biodiversity in the sub-alpine and taiga regions, conservation efforts in these areas ought to be enhanced and concentrated not only on saving what still remains of old-growth forest but also on managing remnants of grasslands and formerly grazed or mowed open forests around former settlements.”
————————————————————————————————————————- 19 October 2009
Nakagawa, S. & Ito, M. (2009): Development and characterization of microsatellite loci in Ixeridium dentatum (Asteraceae, Lactuceae). – Journal of Plant Research 122: 581-584. doi: 10.1007/s10265-009-0253-5
Abstract:
“We isolated and characterized seven microsatellite loci for the perennial herb Ixeridium dentatum ssp. dentatum, an apomictic triploid distributed throughout the lowland areas of East Asia. The number of alleles ranged from two to seven in 32 screened individuals of I. dentatum ssp. dentatum from Japan. The observed and expected heterozygosities were 0.000–0.950 and 0.000–0.891, respectively, calculated using genotypes of 20 individuals of I. dentatum ssp. nipponicum. One locus (msid4) deviated significantly from Hardy–Weinberg equilibrium (P = 0.0001). These microsatellites were also tested for cross-amplification in 11 other taxa of Lactuceae, including five endangered taxa. These primers should be useful genetic tools not only for Ixeridium but also for other Lactuceae taxa.”
————————————————————————————————————————- 19 October 2009
Wang, H., Wortley, A. H. & Blackmore, S. (2009): Pollen morphology of Crepidinae and Lactucinae (Asteraceae: Cichorieae) and its systematic significance. – Grana 48: 160-178. doi: 10.1080/00173130902931209
Abstract:
“The extensive pollen morphological diversity of the Cichorieae has been widely demonstrated, and previous studies have shown that in some cases pollen characters can contribute to our understanding of inter-generic relationships. This paper extends the range of genera for which pollen morphological information is available in two predominantly Old World sub-tribes, Crepidinae and Lactucinae. All the genera discussed were found to produce pollen belonging to previously described types. However, the inclusion of certain, previously under studied Asian genera and species, especially those from China, provides useful new information about the extent of pollen morphological diversity within and between genera in these subtribes, and may contribute to a better understanding of the systematics of these groups.”
————————————————————————————————————————– 15 October 2009
Yamamoto, N., Yano, O. & Ikeda, H. (2009): A new hybrid, Crepidiastrum x semiauriculatum (Asteraceae: Lactuceae), from Okayama Prefecture, Western Japan. – Journal of Japanese Botany 84: 224-228.
Abstract:
“A putative hybrid between Crepidiastrum denticulatum (Houtt.) J. H. Pak & Kawano and C. yoshinoi (Makino) J. H. Pak & Kawano, Crepidiastrum x semiauriculatum N. Yamam. & H. Ikeda (Asteraceae: Lactuceae), is described from a limestone area in Okayama Prefecture, western Japan. This plant differs from the presumed parents by the semi-auriculate base of the inflorescence bracts (deeply auriculate in C. denticulatum and attenuate in C. yoshinoi), and intermediate state of several characters of the flowers and fruits; florets 6-8 per capitulum (11-15 in C. denticulatum and 5 in C. yoshinoi), ligules 8.5-9.0 mm long (7.8-8.3 mm in C. denticulatum and 9.0-9.3 mm in C. yoshinoi), and achenes 3.8-4.3 mm long (3.2-3.8 mm in C. denticulatum and 4.5-5.0 mm in C. yoshinoi). ”
————————————————————————————————————————–22 September 2009
Feulner, M., Schuhwerk, F. & Dötterl, S. (2009): Floral scent analysis in Hieracium subgenus Pilosella and its taxonomical implications. – Flora 204: 495-505. doi: 10.1016/j.flora.2008.06.003
Abstract:
“Species-rich Hieracium subgen. Pilosella is well-known for a high degree of endemism and infra-specific differentiation including many subspecies (’microspecies’) of very restricted distribution. In Hieracium subgen. Pilosella floral scents of 27 predominantly Bavarian species, mostly of Hieracium calodon, H. zizianum and H. densiflorum, are investigated here. Floral scent compositions were studied by GC-MS analysis of dynamic headspace samples. Altogether, 56 floral scent compounds were identified, mainly benzenoids, fatty acid derivatives, monoterpenes, homoterpenes and sesquiterpenes. The chemical patterns were found to be taxon-specific and are thus of taxonomical value. The data support some rearrangements at subspecific level, such as the inclusion of H. bauhini subsp. hispidissimum in H. densiflorum. These rearrangements are supported by morphological data. The traditional species concepts, however, are mostly corroborated by our scent data.”
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14 September 2009
Mráz, P., Chrtek, J. & Šingliarova, B. (2009): Geographical parthenogenesis, genome size variation and pollen production in the arctic-alpine species Hieracium alpinum. – Botanica Helvetica 119: 41-51. 
doi:10.1007/s00035-009-0055-3
Abstract:
“Hieracium alpinum L. (Asteraceae) is an arctic-alpine species distributed throughout Europe with both diploid and triploid cytotypes. We determined the ploidy levels of plants from 23 populations from Austria, Bosnia and Herzegovina, Finland, Italy, Norway, Romania, Slovakia, Switzerland and Ukraine. Data showed a non-overlapping pattern of cytotype distribution: sexually reproducing diploids (2n = 2x = 18) occur solely in the Eastern and Southern Carpathians, while apomictic triploids (2n = 3x = 27) cover the rest of the range. Such clear-cut allopatry is rather rare in vascular plants with geographical parthenogenesis. Comparison of absolute genome size indicates genome downsizing (by on average 3.7%) of haploid DNA amount in triploids relative to diploids. Genome size further correlated with longitude and latitude in the Alps, with decreasing absolute DNA content from west to east, and from south to north. While previously published data indicated complete male sterility of triploid plants, we found that plants from the Alps and Bosnia and Herzegovina commonly produced some pollen, whereas populations from the Western Carpathians and Scandinavia seemed to be almost completely pollen sterile. Scenarios about the evolution of geographical parthenogenesis in H. alpinum are discussed.”
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10 September 2009
Sun, H. Z., Lu, J. J., Tan, D. Y., Baskin, J. M. & Baskin, C. C. (2009): Dormancy and germination characteristics of the trimorphic achenes of Garhadiolus papposus (Asteraceae), an annual ephemeral from the Junggar Desert, China. – South African Journal of Botany 75: 537-545. doi:10.1016/j.sajb.2009.05.001
Abstract:
” Dormancy and germination of dimorphic achenes have been compared within and between numerous species of Asteraceae, whereas only a few such comparisons have been made with trimorphic achenes. Garhadiolus papposus is an annual ephemeral species of disturbed desert habitats that produces three kinds of achenes that differ in size, morphology, pappus development and germination requirements. Fresh central achenes germinated to 10–21% in light at 15/2 and 20/10 °C, while intermediate and peripheral achenes germinated to < 5%. Germination was enhanced by excising the embryo in peripheral but not in intermediate achenes. For peripheral and intermediate achenes, pericarps and/or phyllaries did not inhibit germination of isolated embryos, indicating that water-soluble germination inhibitors were not present in these structures. For central and intermediate achenes, germination percentage increased with duration of dry storage at room temperature. Darkness decreased germination of central and intermediate achenes, while peripheral ones, which were viable, did not germinate at any condition. These data show that 1) the three morphs differ in germination requirements, and 2) difference in germination may be caused by low growth potential of the embryo and mechanical resistance (to embryo growth) of the thick pericarp and/or lignified phyllary.”
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31 July 2009
Marciniuk, J., Vašut, R. J., Marciniuk, P. & Czarna, A. (2009): Taraxacum scanicum Dahlst. group (section Erythrosperma) in Poland: Chorology and seed and pollen morphology of the microspecies. – Acta Societatis Botanicorum Poloniae 78(2): 115-121.
Abstract:
“The genus Taraxacum is taxonomically complicated due to apomixis. Therefore, there are significant differences in knowledge of regional Taraxacum-Floras among European countries. Similarly, some taxa are well characterised with well-known distribution, whereas some ones are known e.g. from a single locality. Taraxacum scanicum of section Erythrosperma is one of the most common microspecies of this section in Europe. recently, this taxon was split into three microspecies. In this study we map the distribution of three described taxa of this group in Poland, i.e. T. scanicum s.s., T. prunicolor and T. cristatum. The survey showed that T. scanicum has a similar distribution as T. prunicolor in Poland. This is in contrast with the hitherto known distribution of both taxa. T. cristatum was found at a single locality that is quite distant from the distribution in southern central Europe. We also provide with new morphological characteristics of achenes and pollen for T. scanicum s.s. and T. prunicolor.”
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31 July 2009
Loomis, E. S. & Fishman, L. (2009): A continent-wide clone: population genetic variation of the invasive plant Hieracium aurantiacum (Orange Hawkweed; Asteraceae) in North America. – International Journal of Plant Sciences 170(6): 759-765. doi: 10.1086/599241
Abstract:
“We investigated the population genetic structure of the invasive plant Hieracium aurantiacum (Asteraceae), a facultative apomict. We generated amplified fragment length polymorphism fingerprints for H. aurantiacum samples from across its invasive range in North America (N = 226) and from six other North American native and invasive Hieracium species (N = 60). Almost no genetic variability was found in the North American H. aurantiacum across locations from Alaska and Oregon to Pennsylvania and Ontario (clonal diversity = 0.035). In contrast, other Hieracium species showed a range of clonal diversities (range = 0.154-1.0). The single H. aurantiacum genotype that dominated the North American invaded range was identical to a sample from the native range (Czech Republic), where low genetic diversity has also been reported. However, we did find evidence of hybridization between H. aurantiacum and at least one other nonnative Hieracium species in North America, indicating that the generation of novel hybrid genetic combinations may be an important factor in this invasive group of Hieracium taxa. Our findings suggest that sexual recombination and genetic diversity are not essential for successful plant invasion and that phenotypic plasticity alone may provide the flexibility necessary for the establishment of H. aurantiacum in diverse habitats. ”
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20 July 2009
Krylova, S. G., Efimova, L. A., Vymyatnina, Z. K. & Zueva, E. P. (2009): Hepatoprotective activity of extract from Cichorium intybus (Asteraceae) root. – Rastitel’nye Resursy 43(2): 89-94 [in Russian].
Abstract:
“Administration of the extract from Cichorium intybus L. root to rats with toxic CCl4-induced hepatitis normalized transaminases activity, glucose content in blood plasma and morphological indices of liver (decreasing number of necrosis and Kupfer cells, vacuolation, leucocyte infiltration and increasing number of hepatocytes with high protein-synthesis activity).”
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17 July 2009
Tyler, T. (2009): Lectotypifications and notes on the application of names of Hieracium sect. Hieracium, sect. Bifida and sect. Vulgata (Asteraceae) based on material from the province of Dalarna, central Sweden. – Nordic Journal of Botany 27: 37-51.
Abstract:
“Lectotypes are designated for 174 names of taxa described based on material from the Swedish province of Dalarna and accepted to belong to Hieracium sect. Hieracium, sect. Bifida and sect. Vulgata. The taxonomic and nomenclatural implications, i.e. taxonomic synonyms and infraspecific taxa not worthy of taxonomic recognition, of the lectotypifications are discussed. Three new combinations, H. mundulifolium (Johanss.) T. Tyler, H. oligasterum (Johanss. & Sam.) T. Tyler and H. transtrandense T. Tyler, are proposed to accommodate the infraspecific taxa H. gilvocaniceps Johanss. var. mundulifolium Johanss., H. expallidiforme (Dahlst. ex. Stenstr.) Dahlst. var. oligasterum Johanss. & Sam. and H. insuccatum Johanss. var. occidentale Johanss. & Sam. respectively, when treated at the rank of species.”
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16 July 2009
Tzvelev, N. N. & Sennikov, A. (gen. Hieracium et Pilosella) (2009): Plantae Asiae Centralis 14b. Compositae (Cichorioideae). – Moscow [in Russian].
A complete treatment of the Cichorieae of Central Asia with keys in Russian, but without species descriptions. The volume comprises the genera Askellia, Cephalorrhynchus, Chaetoseris, Chondrilla, Cicerbita, Cichorium, Crepidifolium, Crepis, Dubyaea, Epilasia, Garhadiolus, Heteracia, Hexinia, Hieracium, Hololeion, Ixeridium, Koelpinia, Lactuca, Mulgedium, Paraixeris, Paramicrorhynchus, Picris, Pilosella, Podospermum, Prenanthes, Pterotheca, Scariola, Scorzonera, Somchella, Sonchus, Soroseris, Stenoseris, Steptorhamphus, Syncalathium, Taraxacum, Tibetoseris, Tragopogon, Trommsdorffia. Some new names are validated, and figures and dot maps are provided for a part of the treated taxa. Central Asia as circumscribed here includes parts of Khirgisia, Kazakhstan, Mongolia and China (entire province Xinjiang, most parts of Tibet, Qinghai, Gansu and Inner Mongolia).
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16 July 2009
Sennikov, A. (2009): The identity of Hieracium largum (Asteraceae). – Annales Botanici Fennici 46: 244-246. http://www.sekj.org/PDF/anb46-free/anb44-246.pdf
Abstract:
“The name Hieracium largum Fr., formerly misinterpreted as a synonym of H. robustum Fr., is reduced to the synonymy of H. umbellatum L. The holotype citation for H. largum is provided.”
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16 July 2009
Gottschlich, G. (2009): Hieracium boreoapenninum Gottschl. (Compositae), a new species from the Northern Apennine (Italy). – Webbia 64(1): 3-7.
Abstract:
” Viene descritta una nuova specie di Hieracium per l’Appennino settentrionale” [A new species of Hieracium is described for the Northern Apennine].
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16 July 2009
Llorens, L., Gil, L. & Boira, H. (2009): Reproductive biology of Launaea cervicornis: A keystone species of the Balearic coastal shrublands. – Flora 204: 456-462. doi: 10.1016/j.flora.2008.05.007
Abstract:
“Launaea cervicornis (Boiss.) Font Quer & Rothmaler, an endemic of the islands of Majorca and Minorca (Balearic Islands), is a keystone species of the cushion-like plant communities of the coastal rocky places. The study of its reproductive biology shows the existence of differential strategies, with reference to other species of the genus. The principal features are: (1) the absence of continuous iteroparity; (2) short average duration of the flowering period (36.8 days); (3) high value of intrapopulational flowering overlap index (0.86); (4) high levels of aptitude to produce fruits having atelechory as preferential mechanism of dispersion; and (5) germination capacity is increased during the autumn of the first year (fruits are not capable of joining the seedbank of the soil). These characteristics are considered to be determinants for its adaptation to the peculiar habitat in which it prospers.”
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16 July 2009
ek
Abstract:
“Background and Aims:
Hieracium subgenus Hieracium is one of the taxonomically most intricate groups of vascular plants, due to polyploidy and a diversity of breeeding systems (sexuality vs. apomixis). The aim of the present study was to analyse nuclear genome size in a phylogenetic framework and to assess relationships between genome size and ploidy, breeding system and selected ecogeographic features.
Methods:
Holoploid and monoploid genome sizes (C- and Cx-values) of 215 cultivated plants from 89 field populations of 42 so-called ‘basic’ Hieracium species were determined using propidium iodide flow cytometry. Chromosome counts were available for all analysed plants, and all plants were tested experimentally for their mode of reproduction (sexuality vs. apomixis). For constructing molecular phylogenetic trees, the external transcribed spacer region of nuclear ribosomal DNA was used.
Key Results:
The mean 2C values differed up to 2·37-fold among different species (from 7·03 pg in diploid to 16·67 in tetraploid accessions). The 1Cx values varied 1·22-fold (between 3·51 and 4·34 pg). Variation in 1Cx values between conspecific (species in a broad sense) accessions ranged from 0·24% to 7·2%. Little variation (not exceeding the approximate measurement inaccurracy threshold of 3·5%) was found in 33 species, whereas variation higher than 3·5% was detected in seven species. Most of the latter may have a polytopic origin. Mean 1Cx values of the three cytotypes (2n, 3n and 4n) differed significantly (average of 3·93 pg in diploids, 3·82 pg in triploids and 3·78 pg in tetraploids) indicating downsizing of genomes in polyploids. The pattern of genome size variation correlated well with two major phylogenetic clades which were composed of species with western or eastern European origin. The monoploid genome size in the ‘western’ species was significantly lower than in the ‘eastern’ ones. Correlation of genome size with latitude, altitude and selected ecological characters (light and temperature) was not significant. A longitudinal component was only apparent for the whole data set, but absent within the major lineages.
Conclusions:
Phylogeny was the most important factor explaining the pattern of genome size variation in Hieracium sensu stricto, species of western European origin having significantly lower genome size in comparison with those of eastern European origin. Any correlation with ecogeographic variables, including longitude, was outweighed by the divergence of the genus into two major phylogenetic lineages.”
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1 July 2009
Ortiz, M. Á., Tremetsberger, K., Stuessy, T. F., Terrab, A., García-Castaño, J. L. & Talavera, S. (2009): Phylogeographic patterns in Hypochaeris section Hypochaeris (Asteraceae, Lactuceae) of the western Mediterranean. – Journal of Biogeography 36: 1384-1397. doi: 10.1111/j.1365-2699.2008.02079.x
Abstract:
“Aim
To analyse phylogeographic patterns in the four species of Hypochaeris sect. Hypochaeris, evaluating possible areas of origin and the microevolutionary processes that have shaped their morphology, genetics and distribution.
Location
Western Mediterranean area.
Methods
We applied amplified fragment length polymorphism (AFLP) markers to a total of 494 individuals belonging to 82 populations of Hypochaeris arachnoidea, H. glabra, H. radicata and H. salzmanniana to determine population structure.
Results
Populations with the largest proportion of private and rare AFLP fragments were found in Morocco. This region was consequently inferred to be the ancestral area for H. arachnoidea, H. glabra, H. radicata and H. salzmanniana. The Guadalquivir River (southern Spain) was inferred to be an effective dispersal barrier for H. glabra and H. radicata. The Strait of Gibraltar was inferred to be a somewhat weaker barrier than the Guadalquivir River for H. radicata and a much weaker barrier for H. glabra. The main barrier for H. salzmanniana coincides with the extension of the Rif Mountains to the Atlantic coast in Morocco, and the Strait of Gibraltar is a much weaker barrier for this species. Hypochaeris arachnoidea appears to have originated in the Atlas Mountains.
Main conclusions
The highest levels of genetic variation in La Mamora forest (H. glabra and H. salzmanniana) or the adjacent central Middle Atlas (H. arachnoidea and H. radicata) in Morocco suggest that these areas were a centre of origin of Hypochaeris sect. Hypochaeris. All three potential barriers – the Guadalquivir River, the Strait of Gibraltar, and the Rif Mountains – have been important in shaping genetic diversity in species of section Hypochaeris.”
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15 June 2009
Uhlemann, I., Ritz, C. M. & Peñailillo, P. (2009): Relationships in Taraxacum section Arctica s.l. (Asteraceae, Cichorieae) and allies based on nrITS – Feddes Repertorium 120(1-2): 35-47. doi: 10.1002/fedr.200811193
Abstract:
“nrITS sequences of 19 Taraxacum-species as well as four outgroups of Asteraceae-Cichorieae were analysed using Bayesian and parsimony analyses in order to establish their systematics. The Arctica s.l. clade together with T. bessarabicum is sister to all derived European and South American taxa. The division of Arctica s.l. into smaller units (sections: Antarctica, Arctica s. str., Australasica) is supported. Within the remaining taxa, Taraxacum farellonicum, a species from the Chilean Andes which is described as new, is supposed to be a hybrid of T. gilliesii and an introduced Ruderalia -species. Section Erythrosperma is well separated and supported. With the exception of T. patagonicum and T. bracteatum which are sister to the other representatives of the European taxa two groups are distinguished: first the Ruderalia/Hamata alliance (including T. tenebricans with some exceptional characters) of predominantly ruderal species and second an assemblage of the sections Celtica, Fontana, Macrodonta, Palustria and Taraxacum prefering a lesser ruderal habitate.”
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8 June 2009
Zhang, J. W., Nie, Z. L. & Sun, H.(2009): Cytological study on the genus Syncalathium (Asteraceae-Lactuceae), an endemic taxon to alpine scree of the Sino-Himalayas. – Journal of Systematics and Evolution 47 (3): 226–230. doi: 10.1111/j.1759-6831.2009.00024.x
Abstract:
“Cytological characters of four species in Syncalathium (Asteraceae: Lactuceae), a small genus with six identified species endemic to alpine scree of the Sino-Himalayan region, are surveyed in this report. Three species (Syncalathium pilosum, Syncalathium chrysocephalum, and Syncalathium disciforme) are examined for the first time. Combined with our previous counts, five species have been cytologically investigated from the genus and the results indicated that all species are diploid with the basic somatic chromosome number of x=8. The karyotype asymmetry of Syncalathium souliei is 2A, distinct from the other four species of 1A, and the remaining species are divided into two subgroups with different karyotypes, consistent with their morphological features. The significance of the cytological evolution of Syncalathium is briefly discussed.”
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8 June 2009
Zhang, J. W., Nie, Z. L. & Sun, H. & (2009): Cytological study on the genus Syncalathium (Asteraceae-Lactuceae), an endemic taxon to alpine scree of the Sino-Himalayas. – Journal of Systematics and Evolution 47 (3): 226–230. doi: 10.1111/j.1759-6831.2009.00024.x
Abstract:
“Cytological characters of four species in Syncalathium (Asteraceae: Lactuceae), a small genus with six identified species endemic to alpine scree of the Sino-Himalayan region, are surveyed in this report. Three species (Syncalathium pilosum, Syncalathium chrysocephalum, and Syncalathium disciforme) are examined for the first time. Combined with our previous counts, five species have been cytologically investigated from the genus and the results indicated that all species are diploid with the basic somatic chromosome number of x=8. The karyotype asymmetry of Syncalathium souliei is 2A, distinct from the other four species of 1A, and the remaining species are divided into two subgroups with different karyotypes, consistent with their morphological features. The significance of the cytological evolution of Syncalathium is briefly discussed.”
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5 June 2009
Crawford, D. J., Archibald, J. K., Mort, M. E. & Santos-Guerra, A. (2009): Pollen fertility of synthetic intra- and interspecific F1 hybrids in Canary Island Tolpis (Asteraceae). – Plant Systematics and Evolution 279: 103-113. doi: 10.1007/s00606-009-0150-3
Abstract:
“Pollen fertility was determined for synthetic F1 hybrids between members of the genus Tolpis endemic to the Canary Islands. Mean fertility varies from 1 to nearly 100%. High hybrid sterility is unusual for island lineages. Surprisingly, the fertility of hybrids between morphologically distinct species was generally higher than some crosses within the morphologically variable group that includes the Tolpis laciniata and T. lagopoda complexes. Within this group, fertility was lower particularly in hybrids involving one recognized segregate species (T. webbii), but none of the four potentially new species had reduced hybrid fertility. Despite the overall fertility differences between groupings within the T. laciniata and T. lagopoda complexes there is variation in fertility within groups; sterility factors have a complex inter-populational distribution. The cause of hybrid sterility is unknown, but preliminary data suggest that both chromosomal and genetic factors are involved.”
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5 June 2009
Qiu, Y. L., Liu, R. S., Wei, D. M. & Tian, H. Q. (2009): Calcium distribution in developing anthers of lettuce (Lactuca sativa). – Annales Botanici Fennici 46: 101-106. http://www.sekj.org/PDF/anb46-free/anb46-101.pdf
Abstract:
“Potassium antimonite was used to locate calcium in the anthers of lettuce (Lactuca sativa). There are no calcium precipitates in young anthers. After meiosis of microspore mother cells, calcium precipitates first appear in the tapetal cells, from which some small secretive vesicles containing many calcium precipitates are secreted into the locule. At a late stage of the microspore, tapetal cells completely degenerate and their protoplasts move into the locule with many calcium precipitates. The calcium precipitates increase in the early microspores, and in the exine. When the microspores form some small vacuoles containing calcium precipitates, and those vacuoles then fuse to form a large one, the calcium precipitates evidently decrease. The large vacuole of bicellular pollen grain discomposes and calcium precipitates again appear in the cytoplasm and then decrease. When the pollen matures, most calcium precipitates are located in its exine with only a few in the cytoplasm.”
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5 June 2009
Tyler, T. (2009): Lectotypifications of names of Hieracium (Asteraceae) based on material from the Swedish provinces Gästrikland, Hälsingland and Medelpad. – Annales Botanici Fennici 46: 107-114. http://www.sekj.org/PDF/anb46-free/anb46-107.pdf
Abstract:
“Lectotypes are designated for 83 names of species of Hieracium sect. Hieracium, H. sect. Vulgata and H. sect. Bifida described by Swedish authors based on material from the provinces Gästrikland, Hälsingland and Medelpad of central Sweden. Whenever needed, the affinities and taxonomic value of the lectotypified taxa and the taxonomic implications of the lectotypifications are discussed. One new combination — H. luculentorum T. Tyler nom. et stat. nov. — is proposed to accomplish the taxon previously described as H. chordosum var. luculentum Johanss.”
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5 June 2009
Galán de Mera, A. & Vicente Orellana, J. A. (2009): Two new species of Taraxacum from high mountains of the Iberian Peninsula. – Annales Botanici Fennici 46: 133-137. http://www.sekj.org/PDF/anb46-free/anb46-133.pdf
Abstract:
“Two species of Taraxacum new to science are reported from Spain. Taraxacum ayllonense A. Galán & Vicente Orell. was found in the Spanish Central System, and T. cantabricum A. Galán & Vicente Orell. was collected in the Cantabrian Mountains in northern Spain.”
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3 June 2009
Tate, J. A., Symonds, V. V., Doust, A. N., Buggs, R. J. A., Mavrodiev, E., Majure, L. C., Soltis, P. S. & Soltis, D. E. (2009): Synthetic polyploids of Tragopogon miscellus and T. mirus (Asteraceae): 60 years after Ownbey’s discovery. – American Journal of Botany 96: 979-988. doi: 10.3732/ajb.0800299
Abstract:
“In plants, polyploidy has been a significant evolutionary force on both recent and ancient time scales. In 1950, Ownbey reported two newly formed Tragopogon allopolyploids in the northwestern United States. We have made the first synthetic lines of T. mirus and T. miscellus using T. dubius, T. porrifolius, and T. pratensis as parents and colchicine treatment of F1 hybrids. We also produced allotetraploids between T. porrifolius and T. pratensis, which are not known from nature. We report on the crossability between the diploids, as well as the inflorescence morphology, pollen size, meiotic behavior, and fertility of the synthetic polyploids. Morphologically, the synthetics resemble the natural polyploids with short- and long-liguled forms of T. miscellus resulting when T. pratensis and T. dubius are reciprocally crossed. Synthetic T. mirus was also formed reciprocally, but without any obvious morphological differences resulting from the direction of the cross. Of the 27 original crosses that yielded 171 hybrid individuals, 18 of these lineages have persisted to produce 386 S1 progeny; each of these lineages has produced S2 seed that are viable. The successful generation of these synthetic polyploids offers the opportunity for detailed comparative studies of natural and synthetic polyploids within a nonmodel system.”
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19 May 2009
Sennikov, A. (2009): The identity of Hieracium corymbosum (Asteraceae). – Annalen des Naturhistorischen Museums in Wien, B, 110: 169-172.
Abstract:
“The name Hieracium corymbosum Pers. is typified with a specimen at L, which taxonomically belongs to H. virosum Pall. The holotype citation for this name is provided.”
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13 May 2009
Michalska, K. & Kisiel, W. (2009): Root constituents of Lactuca sibirica and a comparison of metabolite profiles of L. sibirica and L. tatarica. – Acta Societatis Botanicorum Poloniae 78: 25-27.
Abstract:
“Nine known sesquiterpene lactones, including four lactucin-type guaianolides, four costuslactone-type guaianolides and one germacranolide, were isolated from roots of Lactuca sibirica (Asteraceae), six of which were glycoside derivatives. The chemosystematic significance of the compounds is discussed in the context of sesquiterpenoids present in roots of the closely related species Lactuca tatarica. A comparison of sesquiterpene lactone profiles indicate that the species can be differentiated on the basis of their germacranolide glycoside compositions.”
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13 May 2009
Slovák, M., Urfus, T., Vít, P. & Marhold, K. (2009): The Balkan endemic Picris hispidissima (Compositae): morphology, nucelar DNA content and relationship to the polymorphic P. hieracioides. – Plant Systematics and Evolution 278: 187-201. doi: 10.1007/s00606-008-0137-5
Abstract:
“The only Balkan endemic of the genus Picris, Picris hispidissima, was studied in detail using morphological and karyological methods. The species was shown to be morphologically distinct from the closest taxon, Picris hieracioides, by the pectinate–ciliate indumentum of involucral bracts, dilatation of the peduncle, length of the outer and inner bracts, and indumentum colour. No morphological variation that would require taxonomic classification was found within this species. Despite the diploid chromosome number (2n = 2x = 10) being confirmed for P. hispidissima, variation of up to 9.5% in genome size was found. The likely explanation for this variation is hybridization and introgression with closely related P. hieracioides. The most convincing evidence for this hypothesis is the detection of plants with two clearly different DNA contents arising from a single capitulum found in the location where P. hispidissima and P. hieracioides co-occur.”
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13 May 2009
Šingliarová, B. & Mráz, P. (2009): A taxonomic revision of the Pilosella alpicola group in the Carpathians. – Preslia 81: 23–41.
“A taxonomic study of the Pilosella alpicola group growing in the Carpathians revealed the presence of two morphologically distinguishable taxa: P. ullepitschii (Błocki) Szeląg and P. rhodopea (Griseb.) Szeląg. While P. ullepitschii is endemic to the Carpathians, P. rhodopea is a Balkan subendemic with two isolated localities in the Southern Carpathians (Mt Cozia and Mt Zmeuretu). The core area of distribution of P. ullepitchii is the natural subalpine and alpine meadows of the Western Carpathians (the Vysoké and Západné Tatry Mts in Slovakia and Poland). In addition, only three isolated localities are known from the Nemira Mts (Romanian Eastern Carpathians) and one from the Bucegi Mts (Romanian Southern Carpathians). Interestingly, the Romanian populations occur in man-made habitats (secondary pastures). Karyological and flow cytometric analyses of 305 plants from 13 populations of P. ullepitschii revealed only diploid plants (2n = 2x = 18). One Carpathian population of P. rhodopea from Mt Cozia is also diploid. This is the first report of diploidy in this species. However, the populations from the main part of the distribution of this taxon in the Balkan mountains include other cytotypes. Detailed morphological descriptions and distributions for both taxa are given. ”
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13 May 2009
Yang, J. Y., Choi, K. & Pak, J. H. (2009): A karyotype analysis of Lactuca (Asteraceae) in Korea. - Korean Journal for Plant Taxonomy 39: 24-28.
Abstract:
“The chromosome morphology of two Korean Lactuca (L. indica, L. triangulata) is reported herein. The chromosome number and karyotype of a naturalized plant, L. scariola are reported for the first time. The basic chromosome number was x = 9. Polyploid forms were not recorded. The karyotypes of L. indica, L. scariola, and L. triangulata were 2n = 18 = 2m + 7sm, 2n = 18 = 1m + 6sm + 2st, 2n = 18 = 2m + 5sm + 2st, respectively. Both L. indica and L. triangulata had satellites at the ends of their short arms. The haploid genome lengths of L. indica, L. scariola, and L. triangulata were 56.3 μm, 35.3 μm, and 72.5 μm respectively. Each chromosome length of naturalized L. scariola was 2.7-5.2 μm; the smallest among Korean Lactuca. The chromosome lengths of L. indica and L. triangulata were 4.7-7.6 μm and 2.9-7.9 μm, respectively. The karyotype of L. scariola differed from that of L. indica and L. triangulata both of which belong to sect. Tuberosae. Therefore, L. scariola is thought to belong to sect. Lactuca subsect. Lactuca.”
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8 April 2009
Gottschlich, G. (2009): The genus Hieracium L. (Compositae) of the region Abruzzo (Italy). - Stapfia 89. [in German, with an English abstract.]
From the abstract:
“The Hieracium flora of the region Abruzzo has never been revised systematically. The present knowledge is mainly based on material that was collected up to the beginning of the 20th century. Even some rather recent descriptions were not considered in important floras such as Flora d’Italia or Flora Europaea. Most Hieracium collections have been gathered in the framework of general floristic investigations rather than by Hieracium specialists. To date, important public herbaria (APP, AQUI, FI, NAP, TO, RO, URT) house no more than 900 specimens of Hieracium from the region Abruzzo, many of them (368) in FI. These specimens document a period of 200 years of floristic research in Abruzzo. About 500 further specimens were found in other herbaria. Most of the material was not revised by specialists. As a consequence, the distribution of biogeographically interesting groups (H. sects. Naegelina, Andryaloidea, Villosa, Grovesiana) and the taxonomical position of some taxa remained insufficiently known. Within the project ‘Hieracium flora of the region Abruzzo’ the author collected 2000 specimens during 12 collecting trips between 2000 and 2007. Their distribution is documented by geographical minute squares. In parallel work the material of relevant public herbaria was revised and a systematical research in literature was carried out. For detailed descriptions of the taxa a standardized terminology was compiled (German/Latin). A determination key for all species occurring in Abruzzo is provided (German/English). […]”
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23 February 2009
Gutermann, W. & Gottschlich, G. (2009): Hieracia Benziana (Ein kommentierter Katalog der auf R. von Benz zurückgehenden Hieracium-Taxa). [Hieracia Benziana. (An annotated catalogue of Hieracium taxa described by or otherwise linked to R. von Benz)] - Phyton (Horn, Austria) 48: 239-282.
Abstract:
“The life of Robert von Benz (1863-1921) is highlightened with respect to his botanical activities, which particularly include extensive investigations in the genus Hieracium, usually in close collaboration with the monographer Zahn. The Benz collections (preserved mainly at KL) comprise potential Hieracium types of importance since most Zahn types were destroyed in World War II. A compilation is presented of all names described from Hieracium materials collected by Benz (including some additional names published by him). The original material presently available to the authors (in BP, GZU, KL, M, TO, W, WU) is documented in a catalogue arranged according to the basionyms related to it (in all 73 effectively published names, of which 11 belong to subgen. Pilosella, and 5 are nomina nuda). The basionyms are supplemented with their homotypic synonyms (illustrating their taxonomic fate through Zahn’s monographic work in progress) and with additional notes of nomenclatural and/or taxonomic significance. Of these names, 8 were originally published at the specific level, and 41 at subspecific rank with additionally 2 as new combinations. Of the remaining 18 infraspecific names 2 are illegitimate, and one was not validly published. No original collections were found for 17 of these names so far. The holotype was discovered for H. dollineri subsp. tephromelanum [–> H. dollineri subsp. dollineri], and lectotypes are selected for 32 names: […]. Where possible, comments are given on the taxonomic identity of the lectotypes. H. pseudofritzei (Benz & Zahn) Guterm. is validated at the specific level; the name H. tesinense Evers is revived for a long-neglected taxon.”
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