| Noun | 1. | sunrose - any plant of the genus Helianthemum; vigorous plants of stony alpine meadows and dry scrub regionsgenus Helianthemum - widely distributed evergreen or semi-evergreen shrublets; America; Europe and North Africa to Asia Minor and central Asia Crocanthemum canadense, frostweed, frost-weed, frostwort, Helianthemum canadense - 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 rock rose, rockrose - any of numerous varieties of helianthemums having small rose-like yellow or white or reddish flowers Helianthemum scoparium, rush rose - woody yellow-flowered perennial of southeastern United States |