The arches are cusped like the windows, but are stilted and segmental.
The cusped arch, too, was it actually not intended to imitate vegetation?
I agree that the cusped arch is not meant to imitate a leaf.
The tympana of the choir triforium arches are filled with plate tracery, quatrefoil and cusped.
It contains three pointed and cusped lancets on each side, and is without ...