Submerge them all immediately in a bucket of water. After they've had 30 mins to soak, take a good look at the rzs and see if any of them are striped (sort of like big, dull bumblebees). If any are striped, those are Louisiana irises and must be kept in water until you get them planted in a soggy part of your yard. Even if the "different" ones don't have striped rzs, they look like they are probably some type of beardless iris that requires similar treatment to Louisianas (but perhaps not as boggy growing conditions as LAs).
Those masses might be bearded irises, but I'm not sure. I have seen abandoned clumps of historic TBs being strangled by quackgrass that looked like that.
Whether or not you cut the bearded irises (if that's what they are) apart depends on the effect you want in your garden. If you plant them as clumps, you'll get clumps right away but will probably have to dig and divide them in a year or two. If you cut them apart into smaller clumps or single rzs, you won't have to divide them again so quickly, and you'll have enough to plant in several spots in your garden. It's up to you. If you do decide to cut them into smaller divisions, let the cut wounds heal for a couple of days before planting.
Laurie
