The name means Betrothal in French.  The flowers start out green and develop into a good clear pink fading to a white centre and a pink eye.  The sepals irregular and loose, broad and with a wavy edge when mature.

Gardens found in 28 pre 2000 surveys DA  LHS TR MS & also LHS WIN TR WS RW ABJ as Franchailles

Gardens found in the 10 surveyed in 2010: DA LHS

UK  Plant Finder 2012: Not listed.