helianthemum : Idioms & Phrases
genus helianthemum
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noun widely distributed evergreen or semi-evergreen shrublets; America; Europe and North Africa to Asia Minor and central Asia
WordNet
helianthemum canadense
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noun perennial of the eastern United States having early solitary yellow flowers followed by late petalless flowers; so-called because ice crystals form on it during first frosts
frost-weed; frostwort; frostweed; Crocanthemum canadense.
WordNet
helianthemum scoparium
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noun woody yellow-flowered perennial of southeastern United States
rush rose.