A shrubby semi-evergreen plant (Hypericum calycinum) of Eurasia, having yellow flowers with numerous protruding stamens and often grown as a ground cover. Also called rose of Sharon.
Origin of Aaron's beardFrom the prominent tufts of stamens, in reference to Psalms 133:2.
(plural Aaron's beards)
- (botany) A common name for several plants, which have tufts of stamens. [First attested in the late 19th century.]
- Cymbalaria muralis (ivy-leaved toadflax, Kenilworth ivy)
- Hypericum calycinum (great St. John's-wort, Jerusalem star)
- Saxifraga stolonifera (creeping saxifrage, strawberry geranium)
- Opuntia leucotricha (arborescent prickly pear, Aaron's beard cactus)
- Used other than as an idiom: see Aaron, 's, beard.
From the reference in Psalms 133:2 in the Bible.