I found what Google Lens claims is a "big trefoil" while clearing out a weedy patch in my neighbor's yard. They insisted I pull it up, but I think it looks nice! I looked into it and saw that it was listed as an invasive species for Oregon back in 2008, but most sources say it's a harmless plant from the legume family. I saved some of the seed pods and am considering saving the seeds to plant around my pollinator garden next spring, or even using it as a nitrogen-fixing rotation crop for my annual beds. But it appears to be a long-lasting, self-seeding perennial: Is this a decision I'm going to terribly regret? Thank you, Bryan Lacie