Irises: New question...what do I need to do to these Rhizomes?, 1 by JanetS

JanetS wrote:
I received some iris in trade....hmmm...okay here is a picture. I am not sure what to do with them before I plant them...some look like they are very large "colonies"? and wasn't sure whether to cut them apart or not...I have no idea what they are either at t his time. Some look like tall bearded, but the others do not...any ideas or suggestions would be greatly appreciated...here is a picture of the larger mass and one of the other "type" of iris as well..what do you think? Here is the picture of both kinds...