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Abstrakty/Abstracts

Zprávy České botanické společnosti 48/1, 2013


Abstrakty/Abstracts

Novák P. & Roleček J.
Dub balkánský (Quercus frainetto) – nová lokalita na jihozápadní Moravě a zhodnocení výskytu v České republice
New record of Quercus frainetto in SW Moravia and notes on its occurrence in the Czech Republic

Abstract
Quercus frainetto is a typical species of semi-dry forests of the Balkan Peninsula. The northern border of its natural distribution has by many authors been placed in the SE part of Central Europe. In the Czech Republic, the only well-documented occurrence has been known from the neighbourhood of the town of Znojmo, SW Moravia. A new site was discovered in the Krumlovský les forest in the Moravský Krumlov region about 30 km NE of Znojmo in 2011. Two adult trees belonging to this species were found in the vegetation of an acidophilous oak forest on a granodiorite plateau. The nearest sites outside the Czech Republic are located in southern Slovakia and northern Hungary, but their native status has been disputed by local authors. Thus, the status of the Czech populations is a question indeed. We reviewed the circumstances of the occurrence of Q. frainetto in the Czech Republic and concluded that there is little evidence supporting the hypothesis of its native status.

Kocián J.
Jestřábník bledý (Hieracium schmidtii) ve Štramberském krasu – 157 let trvající botanický omyl
Hieracium schmidtii in the Štramberk Karst – a 157–year long botanical error

Abstract
Hieracium schmidtii is a rare species in Moravia. The only locality in the northern part of Moravia is situated in the Štramberk Karst. This well known locality has been repeatedly and continuously reported for more than 150 years. However, its peculiar phytogeographical isolation, the unsuitable limestone bedrock and unsuccessful recent attempts to find the plants had evoked doubts on the verity of the occurrence at the site. Analysis of botanical literature, study of herbarium specimens and detailed botanical field research revealed that Hieracium schmidtii has never occurred in the Štramberk Karst. The article describes how a single and simple misidentification led to a phantom occurrence of Hieracium schmidtii in the Štramberk Karst. It also elucidates the mechanisms through which this botanical error was maintained and even strengthened by generations of botanists.

Mruzíková Z.
Příspěvek k poznání zajímavých polních plevelů Osoblažska
Interesting segetal weed species in the Osoblažsko region (Silesia, Czech Republic)

Abstract
A list of 15 rare and endangered weed species (Alyssum alyssoides, Aphanes arvensis, Buglossoides arvensis subsp. arvensis, Centaurea cyanus, Consolida regalis subsp. regalis, Fumaria rostellata, Lamium amplexicaule, Lycopsis arvensis, Microrrhinum minus, Neslia paniculata, Odontites vernus subsp. vernus, Sherardia arvensis, Valerianella dentata subsp. dentata, Veronica agrestis and Veronica triphyllos) in Osoblažsko, Silesia, from 2007 to 2012 is provided. Most of the taxa were reported from the investigated area 50 years ago, but reached a greater abundance in the past.

Hadinec J. & Lustyk P.
Additamenta ad floram Reipublicae Bohemicae. XI.
Additions to the flora of the Czech Republic. XI.

Abstract
This eleventh part of floristic contributions includes newly published data of critically endangered species and data unpublished so far. Data of alien species found in the Czech Republic for the first time (Calystegia hederacea, Corispermum gmelinii, Miscanthus sacchariflorus, Scolymus maculatus) are sum­marized. The species Rubus silvae-bohemicae described from the Czech Republic as new to science and Rubus lucentifolius a species new to the Czech Republic, are also listed below. Furthermore, critically endangered species (according to the Red List of Vascular Plants of the Czech Republic) are reported from new sites (e.g., Atriplex rosea, Botrychium multifidum, Carex obtusata, Centunculus minimus, Chenopodium murale, Chimaphila umbellata, Cyperus michelianus, Euphrasia slovaca, Gentianella praecox subsp. bohemica, Heleochloa schoenoides, Hypochaeris glabra, Juncus capitatus, J. gerardii, Jsphae­rocarpus, Lindernia procumbens, Laris loeseliiip, Littorella uniflora, Lycopodiella inundata, Moneses uniflora, Montia fontana, Ophrys insectifera, Orchis ustulata, Orobanche elatior, O. coerulescens, Polycne­mum majus, Potamogeton coloratus, P. gramineus, Pulicaria dysenterica, Pyrola chlorantha, Radiola linoides, Ribes petraeum, Senecio doria, Spiranthes spiralis, Thesium dollineri, Trapa natans, Urtica kioviensis, Veronica opaca, Vscardica, Xeranthemum annuum). Finally, less rare and threatened species are reported from areas where they had not been recorded yet (e.g. Cruciata pedemontana, Polygala serpyllifolia, Spergularia echinosperma).

Malíček J.
Lišejníky Týnčanského krasu
Lichens of the Týnčany Karst (Central Bohemia)

Abstract
Týnčany Karst is a small limestone area in a granite landscape at the south margin of central Bohemia. In total, 258 lichens were recorded in the area during research between 2006 and 2012. Involucropyrenium squamulosum and Usnea substerilis are published for the first time from the Czech Republic, Placynthium subradiatum is new to Bohemia. Eleven taxa are discussed in detail. For several species additional collections from other areas in the Czech Republic are included.