[FamiliarFace]

*** A lot of people have some kind of shrub that turns into a mass of yellow flowers in early Spring. ***

Forsythia?

[Pollard]

That looks like it. (Forsythia × intermedia, or border forsythia) I had assumed it was a native due to a lot of people having them but I guess it's just popular here. I see no equivalent in the MO Dept of Conservation field guide website. Asian so it might be popular because it can grow in low pH soil which large parts of Eastern Asia has. Propagated by cuttings of green wood after flowering in late Spring to early Summer and can spread or be propagated by layering.