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Zprávy České botanické společnosti 41/2, 2006


Lepší M., Boublík K., Lepší P. & Opletal L.
Reveň lékařská (Rheum officinale) - nový adventivní druh ve střední Evropě
Rheum officinale - a new alien species for Central Europe

Six new localities of adventive occurrence of the species Rheum officinale Baillon were recorded in the Czech Republic (districts of Český Krumlov and České Budějovice, South Bohemia). It is highly probable that the taxon is reported as an alien species from Central Europe for the first time. Five localities occur in the Novohradské hory Mts, close to the town of Nové Hrady. In three cases it has persisted close to ruins of expelled German inhabitants' houses for more than 50 years. It has escaped from its current cultivation in two cases. Furthermore, it has persisted in the surroundings of a weekend cottage close to the town of Frymburk in the Šumava Mts for at least 20 years. It is very rarely cultivated in the Czech Republic at present, unlike the past, when it was probably fairly often grown especially by Germans in the Bohemian part of the Novohradské hory Mts. The paper includes a morphological description of the species, map of its adventive distribution in the Czech Republic, a list of localities, a drawing, and a photograph of the species. Information on its practical use is also given.

Hadinec J. & Lustyk P. [eds.]
Additamenta ad floram Reipublicae Bohemicae. V.
Additions to the flora of the Czech Republic. V.

This fifth part of floristic contributions resumes data about taxa newly discovered on the territory of the Czech Republic (Aconitum plicatum subsp. sudeticum and eleven newly described species of the genus Rubus). For the first time, the alien taxa Agrostis scabra, Lithospermum arvense subsp. sibthorpianum, Physalis pubescens and Allium zebdanense are mentioned in the contribution. Also critically endangered species (according to the Black and Red List of Vascular Plants of the Czech Republic) are presented from territories where no occurrence had been reported so far (e.g. Arnoseris minima, Botrychium multifidum, Calamagrostis pseudophragmites, Carex buxbaumii, Gentianella obtusifolia subsp. sturmiana, Hackelia deflexa, Malaxis monophyllos, Orobanche arenaria, O. artemisiae-campestris, O. coerulescens, O. purpurea subsp. bohemica, O. purpurea subsp. purpurea, Phyllitis scolopendrium, Reseda phyteuma, Stachys arvensis, Trigonella monspeliaca). Finally, less rare species are mentioned from territories where they had not been discovered yet.

Jaroš V.
Vegetační a floristické poměry v okolí Slatinského a Hostavického potoka ve východní části Prahy
Die Vegetations- und floristische Verhältnisse in der Umgebung von Slatinský und Hostavický Baches östlich von Prag (Mittelböhmen)

Plant communities and flora of wetlands in the basins of the Slatinský and Hostavický potok brooks in Prague are described. The folloving plant communities were recorded in the studied area: mesic meadows of the alliances Alopecurion pratensis, Calthion and Molinion, and their transition communities to the alliance Arrhenatherion. The large area of the wetlands is covered with reed communities of the association Phragmitetum communis, communities of tall sedges (the associations Caricetum gracilis) and communities of the association Phalaridetum arundinaceae. In the studied area, the following significant taxa were recorded: Rumex sanguineus, Juncus inflexus, Ranunculus sceleratus, Carex nigra, C. vesicaria, Serratula tinctoria, Succisa pratensis, Colchicum autumnale and Eleocharis palustris. On the other hand, several ruderal species are spreading here: Solidago gigantea, Tanacetum vulgare, Dipsacus sylvestris, Aster novi-belgii, Reynoutria japonica, Juncus tenuis, Cardaria draba, and along the Hostavický potok brook Heracleum mantegazzianum. The current vegetation of the wetlands is compared with a wet meadow in the floodplain of the Rokytka Brook near Říčany (SE of Prague). Plant communities occurring here are well-developed and belong mainly to the alliance Molinion, association Molinietum caeruleae. Several taxa rare in this region or listed in Black and Red List of the Czech Flora were recorded here: Gentiana pneumonanthe (C2), Iris sibirica (C2), Dactylorhiza majalis (C3), Trollius altissimus (C3), Primula veris subsp. veris (C4), and Eriophorum angustifolium.

Hendrych R.
Polystichum lonchitis, zvláště různost geneze v naší květeně
Polystichum lonchitis, die Verschiedenheit der Herkunft in unserer Flora besonders

Polystichum lonchitis occurs on the territory of the Czech Republic partly in very limited areas almost exclusively in the high mountains (Krkonoše and Hrubý Jeseník) as a pronounced glacial relict, partly as a plant transported by turbulent activity of air masses from the top areas of the Alps. The localities arisen in the latter way are extremely small; moreover, their existence is in all cases only of temporary, short-term character.

Sutorý K.
Šípatka širolistá (Sagittaria latifolia) v České republice
Sagittaria latifolia in the Czech Republic

Overview of localities of the North American species Sagittaria latifolia Willd. in the Czech Republic. Localities from two phytogeographical regions (Dolní Pojizeří, Moravské podhůří Vysočiny) are published for the first time.

Petřík P.
Zdroje floristických údajů v České republice: jak je získat, zpracovat a využít
Sources of floristic data in the Czech Republic: how to acquire, process and use them

Despite a long tradition of phytogeographical research in the Czech Republic, no complete national distribution database (atlas) based on an up-to-date and systematic field survey is available. This paper deals with (i) available data sources on plant distribution in the Czech Republic, (ii) possibilities to link phytosociological and grid mapping data, (iii) pros and cons of the grid-mapping method, and (iv) suitability of this method for mapping vascular plants in the Czech Republic. Two mapping schemes for the Czech vascular flora are suggested, one based on a long-term, systematic field survey mapping of the whole country within the CEBA quadrants, the other one covering only a part of the Czech Republic during a short time.

Kovář P.
Šedesát let pražské univerzitní geobotaniky (1945-2005)
Sixty years of geobotany at Charles University in Prague (1945-2005)

Sixty years have passed since the Unit of Geobotany started its development in ecological botany at Charles University in Prague. This text is written to document the course of the last decade following a previous article devoted to the fiftieth anniversary of Prague geobotany (Kovář 1996). A list of geobotanists graduated from the Faculty of Science, Charles University, Prague, in the period 1995-2005 is enclosed.