The shamrock dates back to ancient Druids who used the Celtic name ~seanrog~ meaning ~little clover.~ It changed to ~shamroag~ and then to ~shamrock. Folk Names: Wild Clover, Red Clover, Honey, Honeystalks, Shamrock, Three- Leaved Grass, Trefoil, As children we would eat the flowers before they opened. Clover or trefoil are common names for plants of the genus Trifolium consisting of about The flowers are white or rosy, and resemble those of the last species. Trifolium medium, meadow or A common idiom is "to be (or to live) in clover ", meaning to live a carefree life of ease, comfort, or prosperity. The cloverleaf.