In the Sculpted relief form carving refers to steep, radiating ridges and deep grooves in the petal surface which give the appearance that the petal has been carved. See Sculpted, Relief, Embossed.
Carved, Carving
The American Daylily Society

In the Sculpted relief form carving refers to steep, radiating ridges and deep grooves in the petal surface which give the appearance that the petal has been carved. See Sculpted, Relief, Embossed.