Funny I recall thinking those Vic Falls had sort of stubby short stems when I took that pic. They are in Salt Lake City.
I've noticed that the iris in their back yard (south side of the house) do have longer stems than the ones out front. It's a two-story house so the front yard near the house is in the shade for a couple of weeks longer than the back yard. Wonder if it's something to do with warming up later in the spring, so they start growing later, but jump into bloom faster once the sun gets to them, so they don't have as much time to grow long stems? We may never know, they're putting that house up for sale this summer.
