Festuca duriuscula var. campana Festuca heldreichii subsp. achaica Festuca jeanpertii subsp. campana Festuca ujhelyii Festuca ovina subvar. campana Festuca ovina subvar. heldreichii Festuca heldreichii Festuca jeanpertii subsp. achaica
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024