Definify.com
Webster 1913 Edition
Rockrose
Rock′roseˊ
,Noun.
(Bot.)
A name given to any species of the genus
Helianthemum
, low shrubs or herbs with yellow flowers, especially the European Helianthemum vulgare
and the American frostweed, Helianthemum Canadense
. Cretan rockrose
, a related shrub (
Cistus Creticus
), one of the plants yielding the fragrant gum called ladanum
.