Coffeeweed, Senna obtusifolia. HTH Chris

OK! Right plant, wrong species! That's why I asked where you were located. Maianthemum dilatatum is exclusive to the west coast. Wasn't aware there was an eastern version :-) And this is a wildflower - not necessarily a garden escapee. The tarp could help but it will also smother the grass. And it is not that effective for plants that spread rhizomatously (via underground stems). The rhizomes just keep growing to where the tarp doesn't cover and then pop up. Depending on how shady the area is, you might just want to encourage it and skip the lawn. Lawn grasses are difficult to encourage to lush growth in very shady locations and a shade loving groundcover - like this - is often recommended as a suitable replacement. Otherwise, containment would involve some sort of root barrier/edging at the edge of the lawn and some targeting herbicide applications. Any broadleaf weed killer for lawns should work well - the stuff can't tell between a 'weed' or any other type of broadleaved plant. Just spray individual leaves directly and be sure none gets on anything more valuable.

Can you get a closer shot? It's hard to see any detail from the picture. An idea of the scale of the leaves would be useful too.

No, I am still here. Thanks guys for your all suggestions replies. To be honest I am more on the side of Photinia than on Camelia. It is hard to say, they have never saw any blooming on those trees and leaves do look red . But in any case I think they will keep those trees for now, they will trim but that bush (as kiminpl called blob) they probably will remove it and plant small tree as Yardvaark(9A) mentioned. Yardvaark(9A) Thanks for your design and suggestions. We like the idea of multi-trunk tree in front of the blank wall. As biondanonima said it is weird layout. The walkway leads to the driveway/garage that's correct. So thats why there are no reason for them to walk directly out the door and out to the street. And that's why they don't need walkway from the sidewalk directly to the front door. So the idea is to make this entrance more closed from the public. To plant plants in order cover the ugly layout and huge wall, make some privacy. Because the entrance is facing the main road and it is a corner house. There are used to be two huge oak trees in front of the house. When they moved in they had to cut it because they were dead. Thats why that wall look very weird. Here is the picture from 2008. Here is the picture from 2016, you still can see sign on the grass from oak trees I probably should have mention that this is corner house and facing main road. But the real entrance leads from driveway. One more picture: