This photo does look like an I. x germanica to me, and it is colored much
like the more solid purple types such as 'Crimson King', 'Kochii', or
'Nepalensis'. Clones which usually get distributed as I.
germanica in the US are often bluer, and usually have lighter standards than
falls. It is not 'Florentina', unless it is one of the sports that has
changed colors (ie. 'Madonna'), but from what little I've seen, those are
apparently usually lighter and also are bluer with more difference in the
coloring of the standards vs. falls.