Aaron's beard
/ˈɛəɹ.ənz bɪəd/noun
University
1
Cymbalaria muralis (ivy-leaved toadflax, Kenilworth ivy).
2
Hypericum calycinum (rose of Sharon, great St. John's-wort, Jerusalem star).
3
Saxifraga stolonifera (creeping saxifrage, strawberry geranium).
4
Opuntia leucotricha (arborescent prickly pear, Aaron's beard cactus).
5
Used other than figuratively or idiomatically: see Aaron, -'s, beard.