Distributions of vascular plants in the Czech Republic. Part 14

The fourteenth part of the series on the distributions of vascular plants in the Czech Republic includes grid maps of 103 taxa in the genera Achnatherum, Adonis, Consolida, Corallorhiza, Cypripedium, Dianthus, Glaux, Inula, Juncus, Laser, Linum, Mahonia, Malaxis, Mercurialis, Nassella, Ononis, Pseudorchis, Pyracantha, Rosa, Rubus, Sagina, Samolus, Smyrnium, Spiranthes, Stipa and Traunsteinera. These maps were produced by taxonomic experts based on examined herbarium specimens, literature and field records. The spectrum of taxa includes various ecological groups. Rare habitat specialists are represented by the halophytes Glaux maritima, Juncus gerardii and Samolus valerandi, psammophytes Dianthus arenarius subsp. bohemicus and Stipa borysthenica, petrophytes Dianthus gratianopolitanus, D. lumnitzeri and D. moravicus and the serpentinophyte Dianthus carthusianorum subsp. capillifrons. Additional rare and declining species are among orchids, weeds of arable land, and plants of dry grasslands, thermophilous oak forests and subalpine habitats. Three of the included taxa are Czech endemics (Dianthus arenarius subsp. bohemicus, D. carthusianorum subsp. sudeticus and D. moravicus) and two subendemics, with ranges extending into bordering countries (Dianthus carthusianorum subsp. capillifrons and Rubus brdensis). Altogether, half of the mapped taxa are on the national Red List. Alien species are also represented in this paper. The previously introduced neophytes Mahonia aquifolium, Pyracantha coccinea, Sagina apetala and Smyrnium perfoliatum have started to spread in recent decades. Nassella tenuissima has begun to escape from cultivation. In contrast, some formerly more common weeds of arable land have been declining in recent decades. Spatial distributions and often also temporal dynamics of individ ual taxa are shown in maps and documented by records included in the Pladias database and available in the Supplementary materials. The maps are accompanied by comments that include additional information on the distribution, habitats, taxonomy and biology of the taxa.