Marrubium hispanicum Marrubium humile Marrubium rupestre Marrubium saxatile Marrubium scrophulariifolium Pseudodictamnus acutus Beringeria hispanica Ballota acuta Ballota hispanica Ballota italica Ballota rupestris Ballota saxatilis Ballota sicula
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024