Iris "dardanus"
David Victor (Wed, 03 Nov 2010 02:07:38 PDT)

Iain,

I think that the reason you can't find this taxon is because you are
looking for a botanical epithet, whereas it is a cultivar name for a
hybrid e.g. I. 'Dardanus'. These aren't listed on IPNI or the Kew
Database of Monocots.

Best regards,
David Victor