Well. It occurred to my semi-senile mind that I already had the answer all along.
I was asking because I wanted to kill crabgrass in some annual/perennial flower beds without the tedious time-consuming chore of kneeling down and pulling the little devils out by hand.Not necessarily for my lawn because the only broadleaf I like in my grass is white clover. And I don't mind killing some of that here and there because it has started reseeding everywhere in just the last two years. Never before. It is coming up everywhere and it never used to.
So. I remembered I have Ornamec (fluazifop). It will work perfectly.
Sorry to bother everyone. Maybe I dreamed it.
I love garden.org