rush rose: woody yellow-flowered perennial of southeastern United States
helianthemum: any plant of the genus Helianthemum; vigorous plants of stony alpine meadows and dry scrub regions
spermatophyta: seed plants; comprises the Angiospermae (or Magnoliophyta) and Gymnospermae (or Gymnospermophyta); in some classification systems Spermatophyta is coordinate with Pteridophyta (spore producing plants having vascular tissue and roots) and Bryophyta (spore producing plants lacking vascular tissue and roots)