title: Integrative taxonomy reveals cryptic diversity within the Euphorbia nicaeensis alliance (Euphorbiaceae) in the central Balkan Peninsula
abstract: The Eurasian steppes are the second-largest continuous biome on Earth. <i>Euphorbia glareosa</i>, a member of the <i>Euphorbia nicaeensis</i> alliance, is a widespread species in the macroclimatically defined zonal Pontic steppes and westerly and southerly adjacent extrazonal steppe outposts determined by local climatic, topographic, and edaphic conditions. In the extrazonal steppes, in particular within the Anatolian, Danubian, Thracian, and Pannonian grasslands, it is more or less continuously
journal: Frontiers in Plant Science