On the distribution and conservation status of some rare orchid taxa (Orchidaceae) in Bosnia and Herzegovina (Western Balkans)

Abstract Albeit rich in a number of taxa, flora of Orchidaceae in Bosnia and Herzegovina has not been sufficiently studied. The paper presents distribution of ten rare and threatened orchid taxa in the territory of Bosnia and Herzegovina. Serapias bergonii and Himantoglossum calcaratum subsp. rumelicum are new for Bosnia and Herzegovina, while for other studied taxa (Serapias parviflora, Serapias vomeracea, Himantoglossum adriaticum, H. calcaratum subsp. calcaratum, Gymnadenia frivaldii, Pseudorchis albida, Orchis quadripunctata, Cypripedium calceolus) in addition to field investigation, checking and revision of herbarium material, as well as literature sources were also used for supplementing distribution data. The distribution maps of these taxa in Bosnia and Herzegovina are created on a 10 km × 10 km MGRS grid system. Based on the IUCN Red List criteria, the threat status in Bosnia and Herzegovina was assessed for all studied taxa. Data concerning their habitat preferences and population size are also provided.