some kind of thistle??

the finches go nuts for them ... quite acrobatic when going after the seed ..

they said they would take care of them.. what more do you want them to do ... ????

ken

Here is a link that might be useful: link

You could offer to do the work for them. Or ask it you can cut off the flower heads. If they say yes, you will be able to manage the problem so it will not affect your yard. The plant will probably flower again so make sure you have permission to cut them off each time.

If you are not totally sure what it is, take a picture and show it on "name that plant forum." Is this happening in a bed that can't be mowed?

Your description sounds a lot like a datura, possibly d. metel. Its flower color can range from white to purple.

The spiny seed capsule is walnut sized and, when ripe, splits open to reveal a very generous amount of seed.

Here is a link that might be useful: Pictures

Are the flowers large or small?

Could be teasle. That stuff is vicious. We had a few plants here and there at the Cottage and I go after it with a vengence when I find it.