Do they have any markings on the petals?

Not that I can remember. It's been a couple of months since they bloomed.

I'll check with my neighbor to see if she has any photos.

I would image that they are the highly invasive iris pneudorus.

Here it is not allowed to be given, sold, traded nothing as it is killing the water ways in OR and WA

Correct spelling: i. pseudacorus, a water loving iris on many State's noxious weed lists for it's invasive habits in wetlands. Also does just fine in a garden setting, tho not as agressive. It is a yellow beardless iris usually showing some red markings around a signal patch on the falls. Here's a tell - if you cut the rhizome open the inner flesh should be slightly pink-toned. It can be a thug so make sure it doesn't get somewhere you don't want it. Dead head it to keep seeds from traveling.