Not just Overstock. It's a mass produced print all over the Internet, available from Walmart to icanvas and as iphone wallpaper where it's called "brown maple leaf." Seems to have originated from a company called Seven Trees Design, which might be based in Colombia, South America, altho there is also a graphic design studio based in Biddeford, Maine called Seven Tree design. Could be quite a long, winding rabbit hole if one cared to pursue the origin.
with Daisy and Leftwood; it might just be stylized graphic art, so pick some real plant that looks similar.