[Belgianbillie]

I believe they are these flowers:

http://gardeningandgardens.blogspot.com/2014/04/little-blue-spring-flowers-what-are-they.html

Scallia is is pretty, but im afraid they will crowd out grass. Should i kill with RU or do they die of themselves without much damage? They are in a TTTF lawn

 

[MyDixieWrecked]

I wouldn't use Round Up as that is usually a non selective herbicide and will kill off your grass or anything green it touches. I like Bayer Advanced All-In-One Lawn Weed & Crabgrass Killer. Available on Amazon and fairly inexpensive, easy to mix. I usually like to spot treat weeds and then hit them again 3 or 4 days later for best results. I've also done a couple blanket treatments with no harmful effects on the rest of my lawn and grass. Keep in mind, it's not as powerful as commercially available herbicides, but I am always one to try and stay as organic as possible in my lawn, thus the necessity for possibly multiple treatments to really zap the Scalia.

 

[jimmy]

This is super invasive and Bayer Advanced or other products using 2, 4d won't do anything to them. You'll have to use glyphosate to kill them. I'd recommend using a cheap foam brush and gloves to paint it on if this area is small enough, so you don't kill too much grass. You might need 2 or more applications, 1.5-2 weeks apart. If it is widespread, you might have to either live with it or spray the whole area and reseed.