I bought this a few years ago, but the label has disappeared.

It is in flower now, and the flowers are around 15cm across. I though
they were just doubles, white to off-white, but the second photo showing
the outer petals with quite strong green markings, and some in the
centre is something I haven't noticed before. Even the first photo shows
some light greenish shading towards the centre.

https://ibb.co/hLrfj9B
https://ibb.co/fd3dxPJ

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Jeff