rockrose

Rock"rose`, n. (Bot.) Defn: A name given to any species of the genus Helianthemum, low shrubs or herbs with yellow flowers, especially the European H. vulgare and the American frostweed, H. Canadense. Cretan rockrose, a related shrub (Cistus Creticus), one of the plants yielding the fragrant gum called ladanum.

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