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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Merriam-Webster unabridged
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