Iris seed pods?

Iris seed pods?

Hi everyone! I just discovered a weird pod type thing on my Iris.It is formong where the bloom once was...its tri lobed.Is this a seed pod? I have NEVER had this grow on any of my Iris.Im hoping its not aliens waiting to burst forward and zip my garden off into space..or where ever it is aliens come from...LOL.Anyone know what this thing is? If its a seed pod...how long do i wait until I harvest it,or should I just let it be? The seeds would fall into a place i dont want Iris to grow because its reserved for annuals only.Thanks guys and Happy Gardening!!!
Compost

Compost

Pond project.

Pond project.

summmmmmerrrrrrr!!!

summmmmmerrrrrrr!!!

Got something new to play with today

Got something new to play with today

ID the herb

ID the herb

Helppp!

Helppp!