Mystery Irid
Tom Mitchell (Fri, 04 Sep 2009 11:00:14 PDT)

As several others have suggested, I agree that the plant is a
Crocosmia. It looks like a form of C. aurea or C. masoniorum or
perhaps a cross between the two, of which there are several good
examples, e.g. 'Comet'. the book to consult is Crocosmia and
Chasmanthe by Goldblatt, Manning and Dunlop. Gary Dunlop owns
Ballyrogan Nurseries in Northern Ireland and probably knows more
about this genus in cultivation than anyone. His email address (which
isn't a State secret, since you can readily find it via Google) is
gary.dunlop[at]btinternet.com. He may be able to put a name on it for
you.