Tiny plant, tiny yellow flowers

The following was received via email from Jane:

I am trying to identify this plant. I live in cleveland ohio, bought it from a store without a tag on it. The flowers are smaller than my pinky nail and the plant is only about 6" tall.

 

Maybe Melampodium? Something like 'Million Gold'

 

Close but not it. The stems are a little red / purplish and the leaves are more slender and not so many of them, less bushy

 

Some Lasthenia?

 

What about Sanvitalia procumbens? That's a common garden plant.

 

That might be it, I'm still researching.THANKS! Jane