Helena Wieclaw

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Verified

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• PhD
• Professor (Associate) at University of Szczecin

The last pan‐European key to Carex taxa was published in 1980 by Chater. Since that time several new species have been described, and numerous nomenclatural changes, including the recognition that the former genus Kobresia should be incorporated into Carex as C. subg. Euthyceras, have been made. This article provides a comprehensive key to identify...

Carex riloensis was described from Bulgaria as a species morphologically very similar to C. tricolor but differing significantly in the number of chromosomes. This species is regarded as endemic to Bulgaria, recorded only from the Rila Moutains and the Western Rhodopes. The goal of this study was to clarify the taxonomic status of C. riloensis thro...

Carex distachya Desf. is a circum-Mediterranean species. Since 1985 two varieties have been distinguished, C. distachya var. distachya and C. distachya var. phyllostachioidea Ö.Nilsson. The former is widespread, while the latter is considered to be restricted to West Türkiye and the East Aegean Islands, but our research has revealed that C. distach...

Lectotypes are designated for two Carex buekii hybrid names. The typification is supplemented with notes on their morphology, ecology, and distribution.

This paper presents new localities of rare, threatened and newly discovered vascularplant species in Tatra National Park (S Poland). Data were collected during field studies carriedout mainly in 2020–2022. We have described 122 localities of 57 taxa, including 10 new once forthe local flora, providing basic topographic, site and population data....

Carex vulpina and C. otrubae are closely related and morphologically similar species that hybridize with C. remota. The spontaneous appearance of hybrids can cause difficulties in the taxonomic treatment of this group. Morphological separation of the examined species and hybrids had been tested using discriminant function analysis (DFA). We have al...

This paper presents new localities of rare, threatened and newly discovered vascular plant species in Tatra National Park (S Poland). Data were collected during field studies carried out mainly in 2020-2022. We have described 122 localities of 57 taxa, including 10 new once for the local flora, providing basic topographic, site and population data.

The flora of Armenia comprises about 3800 species of vascular plants (The fifth national report to convention on biological diversity. Yerevan, 2014). A characteristic feature of the flora is the absolute predominance of both the number of species and genera of angiosperms – about 97%. Club mosses, horsetails, and ferns are represented by 39 specie...

A lectotype is designated for the name Carex curvata Knaf on a herbarium specimen found in the PR (National Museum, Prague). The specimen we selected seems to correspond to the author’s original concept of the name as supported by the herbarium label written by the author of the name and including the same locality as mentioned in the protologue. T...

Species within the Carex section Ammoglochin are difficult to distinguish, due to their similarity and a lack of clear-cut morphological characters. In Poland, all seven European species (Carex arenaria, C. brizoides, C. colchica, C. curvata, C. praecox, C. pseudobrizoides, and C. repens) have been recorded. These taxa can be determined reliably by...

In 1954 a particular Carex was found near Amerongen (Province of Utrecht, the Netherlands). According to herbarium labels in Leiden (L), the botanists of those days thought it to be Carex curvata, new for the Netherlands, but they did not publish anything about this find. A recent search could confirm the still existing population. Further research...

Carex buekii is a highly adaptive species showing a fairly wide ecological spectrum. It belongs to the group of river corridor plants which are vulnerable to any human activity directed at transformation of river valley habitats worldwide. This study was aimed at: determining the phenotypic variability of the species in the central part of its rang...

Background. Carex buxbaumii and C. hartmaniorum are sister species of the clade Papilliferae within the monophyletic section Racemosae. An unambiguous identification of these species is relatively difficult due to the interspecific continuum of some morphological characters as well as the intraspecific variability. The study was aimed at determinin...

The occurrence of Carex phyllostachys (Cyperaceae) in the Croatian flora is documented here for the first time. This rare Euro-Caucasian species was found in June 2019 in deciduous sub-Mediterranean Quercus pubescens-Carpinus orientalis forests on Mosor Mt in central Dalmatia. This record represents the north-western distribution limit of this spec...

The article presents an up-to-date overview of the genus Carex (Cyperaceae) in Armenia, including a key and maps of the taxa.

Two Carex acuta hybrids have been provided with a binomial name.

The Carex flava aggregate belongs to one of the most taxonomically difficult groups of sedges which colonize diverse habitats, from organic to sandy, from acidic to alkaline, usually humid and moist. The study included 129 vegetation plots and ten soil variables (organic matter, phosphorus, potassium, magnesium, calcium, carbonates, carbon, nitroge...

Carex punctata (Cyperaceae) at the Marchfeldkanal, a newcomer to the flora of Vienna Carex punctata is reported as a new taxon for the flora of Vienna. The species has been found at the maturation pond of the Marchfeldkanal in the 21st District of Vienna (Floridsdorf). Many other species are reported here as new for this part of Vienna. K e y w o r...

Counting chromosomes is the first step towards a better understanding of the karyotype evolution and the role of chromosome evolution in species diversification within Carex; however, the chromosome count is not known yet for numerous sedges. In this paper chromosome counts were performed for 23 Carex taxa from Armenia, Austria, the Czech Republic,...

Carex buekii is a tall sedge, forming large stands in wetlands, particularly in river floodplains across Central Europe and thus on many sites determining the typical appearance of riverine habitats. Our paper aims at increasing the knowledge on ecology of C. buekii and its role in the wetlands. Field data were collected in Poland, the Czech Republ...

Carex bulgarica (Domin) Lazare 1986 is a younger homonym of C. bulgarica Velen. 1889, the latter being validly published as an alternative name along with C. digitata var. bulgarica Velen. Therefore we publish here a replacement name, Carex lazarei, for the species previously called C. bulgarica by Lazare. Carex lazarei belongs to the C. sempervire...

Carex ×kneuckeri (C. hirta × C. rostrata) is reported here for the first time to occur in south-eastern Poland and central Europe. Although both parents are widespread and common species in Europe, the hybrid is extremely rare or overlooked, worldwide only known from France (one locality), Sweden (two localities) and now also Poland (one locality)....

All the material of Carex section Ceratocystis kept in the herbarium of Naturalis Biodiversity Center in Leiden (L), to be precise 1412 sheets, has been revised in order to get a better understanding and more complete overview of the occurrence of the native species and hybrids within this section in the Netherlands. The hybrid material from the Hu...

Recently the hybrid Carex × pauliana [C. hostiana × C. oederi] has been found for the first time in the Province of Fryslân (formerly called: Friesland; since 2004 officially: Fryslân) in the Netherlands. In this article the authors pay attention to the distribution, habitus, ecology and morphology of this very rare hybrid. A comparison is made wit...

The vegetation of protected salt meadows along the Baltic coast is fairly well known; however, dandelions have been so far treated as a collective species. The aim of our study was to examine the microspecies diversity of the genus Taraxacum in Polish salt and brackish coastal meadows and to analyse soil property preferences of the dandelion micros...

This article makes clear that Carex atherodes does not occur in Serbia, like, erroneously, mentioned by Jiménez-Mejías et al. (2012).

Carex buekii is a rare species, native to Europe and the Middle East, although its full geographical distribution is poorly known. Attention is paid to the global occurrence of C. buekii. Its situation and threat status is presented in relation to each country from which this species is known. Carex buekii forms four (rare) hybrids, each with other...

Background: Variable habitat conditions contribute to morphological variability that plays a substantial part in evolution of plants. Understanding the extent of phenotypic plasticity has important implication for assigning individuals to taxa. Aims: I analysed morphological variability among populations within species of the Carex flava group and...

The paper presents new records for 29 vascular plant species from 12 Eurasian countries. Seven taxa (Agave sisalana, Austrocylindropuntia subulata, Lagurus ovatus subsp. nanus, Opuntia stricta, Orobanche serbica, Oxalis articulata, Vitis × instabilis) are reported from Albania, one (Allium carinatum) from the Europaean part of Russia, six (Dipsacus...

All the material of the section Phaestoglochin that is kept in the herbarium of Naturalis Biodiversity Center in Leiden (L), in total 817 collections, has been revised in order to get a better understanding and a more complete overview of the occurrence of the four native species of this section in the Netherlands: Carex divulsa, C. leersii, C. pai...

The occurrence of the Carex hybrid C. xwalasii [C. atherodes x C. hirta] in Western Pomerania, PL

The occurrence of the Carex hybrid C. xwalasii [C. atherodes x C. hirta] in Western Pomerania, PL

Carex remota, a widespread species in Europe and Asia, was found for the first time in Armenia in June 2016. It was discovered at two sites in the S of the country. Its distribution and ecology are briefly discussed. Also some notes are given about a few rare Armenian Carex species, which were found during field trips in the last fourteen years.

All European taxa of Carex section Racemosae were assessed using macromorphological (mainly quantitative) and micromorphological characters (sculpture of utricles and nutlets). Morphological separation of the specimens examined was tested using discriminant function analysis (DFA). Micromorphology of utricles and nutlets was investigated using scan...

Carex pallidula is a European species which is often overlooked because it is similar in appearance to C. digitata. So far, this species has been recorded from ten European countries. During herbarium studies in 2014 and 2015, the occurrence of C. pallidula was confirmed for another six European countries (Albania, Austria, Greece, Romania, Serbia,...

All the material of the section Ammoglochin that is kept in the herbarium of Naturalis Biodiversity Center in Leiden (L), in total 1068 collections, has been revised in order to get a better understanding and more complete overview of the occurrence of the five native species of this section in the Netherlands. A key is provided for the identificat...

Caricetum buekii Kopecky et Hejný 1965 in south-west Poland

Factors determining the distribution of highly endangered marsh dandelion species in Polish and Estonian coastal grasslands have been investigated. The aim of this study was twofold: (i) to determine which environmental variables are responsible for the vegetation patterns in coastal grasslands with marsh dandelion and (ii) to analyse the ecologica...

The hybrid Carex diluta×C. distans has been found new for Armenia. This is the first Carex hybrid mentioned for Armenia. For Carex hartmanii and Carex muricata subsp. ashokae additional localities are reported. Both formerly overlooked species are widely distributed in Armenia. The occurrence of Carex cilicica has been confirmed.

The aim of this study was to check a hypothesis on the morphological variability of the Platanthera chlorantha growing in forests in the north-west of Poland (Dobrzany and Karnieszewice Forestries). Statistical techniques were used to analyse 16 morphological characters determined in 174 flowering specimens. A special attention was paid to the size...

The occurrence of Carex hartmanii in Armenia

Natural populations of hybrids and populations of parental species of the Carex flava aggregate, growing in seven localities in Poland, were studied. Statistical methods were used to analyse 30 morphological characters measured from 399 dried specimens. The results allowed us to recognize the following hybrids : C. × alsatica [C. flava × C. demissa...

Sedges of Carex flava agg., typical of moist or wet habitats, are difficult to classify because of a lack of clear-cut morphological differences between them and the existence of numerous hybrids. This monograph presents results of research conducted in 2007-2012 in various parts of Poland. The plant material consisted of 1852 living specimens of C...

This paper presents lists of localities and distribution maps of Carex taxa of the section Ceratocystis in Poland. Distribution maps of individual taxa are based on the ATPOL grid, using material deposited in Polish herbaria and private collectionsas well as material collected during field research in 2007-2012. The collected data indicate that (i)...

Uni-variate and multi-variate statistical methods, based on data taken from dried specimens, were used to determine the morphological variance of Carex hostiana 3 Carex flava agg. hybrids and to establish their parents among members of the C. flava complex. The following hybrids were found: C. demissa 3 hostiana [C. 3 fulva], C. hostiana 3 lepidoca...

Morphological differences among 20 populations of Carex viridula growing in different habitats in Poland were analysed based on examination of 365 specimens. Soil samples collected from each habitat were assayed for pH, organic matter, organic carbon, nitrogen, carbonates, and exchangeable elements (Ca, Mg, K, P). Statistical methods were used to d...

The only known station of Carex extensa Good. in Poland, formerly considered extinct, was confi rmed in the city of Kołobrzeg in the Parsęta River Valley, NW Poland, during a search in 2009. Carex extensa was growing in a transitional phytocoenosis between salt-meadow Juncetum gerardi and subhalophilous rush Scirpetum maritimi on salt marshes suppl...

The only known station of Carex extensa Good, in Poland, formerly considered extinct, was confirmed in the city of Kolobrzeg in the Parsçta River Valley, NW Poland, during a search in 2009. Carex extensa was growing in a transitional phytocoenosis between salt-meadow Juncetum gerardi and subhalophilous rush Scirpetum maritimi on salt marshes suppli...

Morphological variability of the Carex oederi s. l. inflorescence The most variable features describing Carex oederi s. l. include: ( i ) the distance between two lower female spikes, ( ii ) the length of the peduncle of a lower female spike, ( iii ) the distance between two upper female spikes, ( iv ) the length of inflorescence and peduncle of a...

This paper presents the distribution of Geranium pyrenaicum Burm. f. in Poland. Some of the locations listed here had already been included in previous publications of the subject. The other stations have never been published before or were originally found by the authors in the area of the Szczecin province.