Lenka Záveská Drábková

Oreojuncus trifidus is a species of rush known by the common names highland rush and three-leaved rush. It is native to the Northern Hemisphere, where it is an arctic/montane species with an amphi-atlantic distribution.

Oreojuncus is a small genus of flowering plants in the rush family Juncaceae, found in the eastern United States, eastern Canada, Greenland, Iceland, the Faroes, most of Europe, northern Russia, western Siberia and the Altai. Their chromosome number is 2n=30 (x=15), whereas Juncus, from which they were split, has x=20.

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Juncinella is a genus of flowering plants in the family Juncaceae. It includes seven species of rushes native to Africa, Europe, and parts of western and Central Asia. The species in the genus were formerly placed in the large genus Juncus. In 2022 Viktorie Brožová et al. published a phylogenetic analysis of the cyperids (families Juncaceae, Cyperaceae, and Thurniaceae) which found the genus Juncus to be paraphyletic, and the authors proposed that six new genera, including Juncinella, be split from Juncus.

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