Stan zachowania flory rezerwatu Biele (Nadleśnictwo Sokołów Podlaski) po 20 latach ochrony

The state of the flora of the Biele nature reserve (Sokołów Podlaski Forest District) after 20 years of nature conservation was assessed. Only one species noted in 1989 was not confirmed at present, whereas 38 newcomers were observed. Most of them (30 species) prefer light and half−light/light conditions and are mainly related to non−forest communities. Frequency of synanthropic species is still very low (2.4%) and no anthropophytes were noted in the reserve. All protected and endangered plants, eg. Trollius europaeus, Gladiolus imbricatus, Dactylorhiza fuchsii, except of Carex umbrosa, still occur within its borders. Active protection of Trollius europaeus and Gladiolus imbricatus by removal of brushwood was suggested.