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Abstrakty/Abstracts

Zprávy České botanické společnosti 40/1, 2005


Abstrakty/Abstracts

Brabec J.
Současný stav rozšíření hořečku mnohotvarého českého (Gentianella praecox subsp. bohemica) v ČR
Recent distribution of Gentianella praecox subsp. bohemica in the Czech Republic

Abstract
Gentianella praecox subsp. bohemica is an endemic taxon of the Czech Massif and a subendemic one of the Czech Republic. Its historical distribution included also Bavarian part of the Šumava Mts (Germany), northern part of Austria and southern part of Poland. In the past this species was distributed quite plentifully in mesophytic and oreophytic areas (rarely in termophytic areas) nearly all over the Czech Republic. G. praecox subsp. bohemica has never been found in W or NW Bohemia and S or SE Moravia. It has mainly been recorded from pastures, submontane and montane Nardus grasslands (Cynosurion, Violion caninae and Nardion), some mowed mesic and intermittently wet meadows (Arrhenatherion and Molinion), some broad-leaved dry grasslands and pastures (Bromion erecti and Koelerio-Phleion phleoidis) and many disturbed habitats (path edges, quarry rims, forest edges). The number of localities of G. praecox subsp. bohemica has been decreasing since 50’s. The decline is probably due to changes of landscape management (finish of grazing, eutrophication of soil, increase of vegetation canopy, and reforestation of habitats). G. praecox subsp. bohemica was found on 64 localities all over the Czech Republic in years 1999–2004. The list of these localities is given together with vegetation types, floristic comments and parameters of population size. Data about historical and recent management, endangerment and bibliography of localities are included. Condition of localities, size of populations, and protection of all localities in the Czech Republic are analyzed.

Lepší M.
Mochyně pýřitá (Physalis pubescens) – poprvé přechodně zplanělá na území ČR
Physalis pubescens – first temporary occurrence in the Czech Republic

Abstract
Physalis pubescens has been found as a new alien species for the Czech Republic in the village of Zlatá Koruna (distr. Český Krumlov, South Bohemia). One plant individual was found there on the heap spoil. The locality is described in the report.

Chán V. & † Skalický V.
Příspěvek ke květeně území mezi Týnem nad Vltavou a Purkarcem v Jihočeské pahorkatině
Contribution to the flora of the region between Týn nad Vltavou and Purkarec (South Bohemia, Czech Republic)

Abstract
The presented study contains floristic material from the region situated between Týn nad Vltavou and Purkarec (South Bohemia, Czech Republic). The material was collected by the members of South Bohemian branch of the Czech botanical society in České Budějovice during the collective floristic survey between the years 1975 and 1983. In the studied area, 375 localities were visited and 673 taxa were recorded.

Hadinec J., Lustyk P. & † Procházka F. [eds.]
Additamenta ad floram Reipublicae Bohemicae. IV.
Additions to the flora of the Czech Republic. IV.

Abstract
This fourth part of floristic contributions resumes the data about taxa newly discovered in the Czech Republic territory (Carex obtusata, Epipactis leutei, E. moravica). The newly described species Cerastium caesareosylvaticum Toman is mentioned as well. For the first time, the alien species Conyza triloba, C. bonariensis, Eragrostis albensis, E. pectinacea, Oenothera coronifera, O. stricta and Persicaria pensylvanica are mentioned in the contribution. The newly found species, previously considered to be extinct in the Czech Republic territory (Chenopodium chenopodioides, Urtica kioviensis, Veronica scardica and Xeranthemum annuum), are listed below. There are presented the critically endangered and endangered species (according to the Black and Red List of Vascular Plants of the Czech Republic) also from territories, where no occurrence have been reported so far (e.g. Asplenium adiantum-nigrum, Botrychium multifidum, Equisetum variegatum, Goodyera repens, Notholaena marantae, Senecio paludosus subsp. paludosus, Sesleria uliginosa). The less rare species from the territories, where they have never been discovered yet, are mentioned.

Franklová H. & Kolbek J.
Mechorosty Přírodních rezervací Na Babě a Brdatka v CHKO a BR Křivoklátsko
Bryophytes of the Nature Reserves Na Babě and Brdatka in the Křivoklátsko Protected Landscape Area and Biosphere Reserve (Central Bohemia)

Abstract
Floristic composition of the species-various bryophyte communities of rocks, steppe, broad-leaved forests, forest springs, boulder screes, and brooks of two Nature Reserves Na Babě and Brdatka in the Křivoklátsko Protected Landscape Area and Biosphere Reserve, Central Bohemia, was studied. During 2003 and 2004, 107 species of bryophytes (15 liverworts and 92 mosses) were collected. The occurrence of Platygyrium repens, Didymodon spadiceus, D. tophaceus, and Eucladium verticillatum (endangered species in the Czech Republic) is remarkable.