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helianthemum

noun
he·​li·​an·​the·​mum | \ ˌhēlēˈan(t)thəməm\

Definition of helianthemum

1 capitalized : a geus of Eurasian herbs or undershrubs (family Cistaceae) having showy variously colored flowers with fugacious petals
2 plural -s : any plant of the genus Helianthemum

— called also rockrose, sunrose

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History and Etymology for helianthemum

New Latin, from heli- entry 1 + -anthemum

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