Cistus umbellatus subsp. libani Cistus umbellatus subsp. umbellatus Cistus umbellatus subsp. micranthus Cistus umbellatus var. viscosus
Helianthemum umbellatum Helianthemum umbellatum var. subdecumbens Halimium umbellatum Halimium umbellatum var. vulgare
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024