Spotting

I agree with Nuwans ID but it also known as an apostle Iris. It has the name walking Iris from the way it spreads around the garden with new ones growing side by side as the old ones die out making it look like it 'walked' there.

Pretty!

Cypella sp, iridaceae

It sure looks the same as the one you found.

I found one of these in Hawaii. I thought it was an Apostle Iris, check it out: http://www.projectnoah.org/spottings/891...

Possibly a flag iris - iris versicolor.