what does Helianthemum scoparium mean?

HELIANTHEMUM SCOPARIUM as NOUN

Meaning
- woody yellow-flowered perennial of southeastern United States
Synonym(s)
- rush rose (what does rush rose mean?)
Hypernyms(s) Helianthemum scoparium is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
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