Ours are weak plants

Fertile florets mauve, almost obscured by the white sterile florets.  With 3 or 4 sepals opening with curded edges and remaining dish shape for some time. (Description ofDerbyplants)

Gardens found in 28 pre 2000 surveys DA  TR

Gardens found in the 10 surveyed in 2010: DA

UK  Plant Finder 2012: Not listed.