Just because they are all flowers, that doesn't mean these items work together on the wall. These prints don't even complement your furnishings. I would suggest a different concept.

If you love the artwork, then by all means go for it. I would get the other piece framed and make sure the collage does not extend past the love seat.

I'd use one piece of art. It can be as wide as 75% of the sofa's width. Not crazy about any of these florals and agree with Beverly that they aren't going to work with your stuff. Ditch all of them and the pillows, re-photo and post again. Houzzers will make some awesome suggestions!

Use them around the house. Florals are coming back into fashion in 2017.

The picture on the left with the horizontal black and white stripes in the vase works well with your black and white striped pillows. I would use that and add to it if you want grouping with black framed pieces that somehow repeat that black and white theme. That would work. You don't have to have all pictures either perhaps a black carved piece, like an ethnic mask, or a black feathered piece. Change up textures for more interest.