I found it interesting that such a small piece of rhizome (plus fan) would lead to successful replant.
Did receive one similiar this past summer and was surprised when it survived.
Zone 6 KY
From: Karl <email@example.com>
To: Karl <firstname.lastname@example.org>
Sent: Wed, Jan 15, 2014 3:22 pm
Subject: [iris-photos] FW: Orris
Interesting use of iris rhizomes