Achillea setacea in the Czech Republic, with taxonomic remarks

A taxonomic account of Achillea setacea Waldst. et Kit. from the Central European perspective is given. The names A. setacea, A. setacea subsp. dolopica Freyn et Sint., Achillea setacea var. brevifolia Rochel, and A. fililoba Freyn are typified, the last one being excluded from the synonymy of A. setacea. The intraspecific variation observed need not to be expressed in taxonomic terms. The distribution maps of A. setacea in the Czech Republic are presented, based on examination of more than 775 herbarium specimens from almost all public Czech herbaria. Phytosociological affinity and interspecific relations of the species were studied using 205 relevés extracted from the Czech national vegetation database. Ecological requirements of A. setacea and regional distribution pattern are discussed on the background of its distribution in neighbouring countries and from a more general phytogeographical point of view.