The Red List of Zelkova

The Red List of Zelkova covers all six species of Zelkova, is a small genus of relict trees belonging to the elm family (Ulmaceae)Five species are reported as threatened while the last species is classified as Near Threatened. The greatest threat is anthropogenic habitat fragmentation and the resulting geographic isolation of subpopulations as well as a very low rate of natural regeneration  and high seedling mortality.