Walking Irises.  These tender members of the Iris Family are native to Central and South America.  They are attractive and some are fragrant.  All have to be protected from cold.  

Neomarica candida.  

Neomarica fluminensis.

I don't know how I ended up with double image but this is Neomarica northiana.  

Neomarica 'Regina.'

Trimezia.