Evolutionary origin and systematic position of Euphorbia normannii (Euphorbiaceae), an intersectional hybrid and local endemic of the Stavropol Heights (Northern Caucasus, Russia)
Journal: Plant Systematics and Evolution
Year: 2021

Abstract The Caucasus is one of the richest areas in the world in terms of animal and plant diversity, harbouring 6400 plant species. As a part of the Northern Caucasus, the Stavropol Heights are renowned for their local endemism, highlighted by six species of flowering plants endemic to this area. One of them is the annual species Euphorbia normannii , described in 1891, but with uncertain taxonomic position. We here used nuclear ribosomal internal transcribed spacer and plastid trn T– trn F se