Hieracium bicolor subsp. terianum Hieracium bicolor subsp. pogonatum Hieracium bicolor subsp. bicolor Hieracium bicolor subsp. timbalianum Hieracium bicolor subsp. trichodermum Hieracium bicolor subsp. sclerophyllum Hieracium bicolor subsp. pogonatoides
Hieracium bourgaei subsp. bicolor
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024