In the Sculpted relief form, embossed refers to raised ridges spreading outward from the throat and midrib over the surface of the petals. See Sculpted, Relief, Carved.
Embossed
The American Daylily Society

In the Sculpted relief form, embossed refers to raised ridges spreading outward from the throat and midrib over the surface of the petals. See Sculpted, Relief, Carved.