Flowers. Macro. Light
4K HD Wallpaper: Flowers. Macro. Light
I'm not sure what kind of flowers there are, but as phone background looks absolutely gorgeous this macro image. Of course you can have it as desktop backgrounds too or from Lukasz's courtesy can be used even in commercial projects under CC0 license.
Widescreen Desktop / Macbook (Retina): 2880x1800 (fits on: 2560x1600, 1920x1200, 1440x900)
High Definition HD 1080p: 1920x1080 (fits on: 1600x900, 1366x768, 1280x720)
Samsung Galaxy Tab & iPad: 2048x2048 (compatible with many tablets)
HTC, Samsung Galaxy & iPhone: 1080x1920 (compatible with many phones)