Nature in Red
4K HD Wallpaper: Nature in Red
I'm not sure what kind of tree it is, but the photography was made this Spring and if you like it you can have it as phone and desktop background at 4K size for free from Grant's courtesy.
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)