The article summarises the results of a long-term floristic survey in the surroundings of lime-pit in Horní Lánov in Podkrkonoší. In the course of detailed stocktaking from 2000-2009 49 endangered plant species according to PROCHÁZKA al. (2001). All important species were counted, located by GPS and transformed into graphic form. For every important taxon the findings in particular localities, total number of individuals in the area (approximate ration between fertile and sterile) are mentioned in the article. Various analyses show the link to location and biotopes lay-outs in the relation to the basic ecological factors. In 37 localities detailed stocktaking and phytocoenological investigation were carried out.