Kitaibelia vol. 6 – no. 2. (2001) p.371-375.
Ophrys apifera Huds. és Apium repens (Jacq.) Lagasca előfordulása a Vértesben
Site conditions of two particularly important species are discussed in detail. Ophrys apifera and Apium repens were discovered in the northern part of the Vértes Mts. during floristic research continued since 1994. Ophrys apifera has one of the biggest known populations in the country scattered at a 60 ha large site of mine recultivation with various site conditions. The former opencast coal mining area was covered with grey waste material and planted with Robinia. The bee orchid is missing from plantations of black locust with a dense understorey and a common species set but, except the very dry places, inhabits those patches where black locust was not planted or has not established. The population measured 400-450 flowering individuals in 1998. The species was also recorded at Homok-Szőlők, a recultivation area planted with Scotch fir. The third recorded habitat of the bee orchid called Cica-homok is also planted with Scotch fir. In this young plantation the grass layer is not yet shaded by the canopy.
Apium repens was recorded in a former river bed of the Által-ér near the village of Bokod. After the river control in the early 1900s the site developed into a wet pasture. In the 1980s it was ploughed but abandoned and covered with grassland again. Coenological tables represent the newly discovered habitats of the two species.