If you look for a photography with beautiful flowers for set in desktop backgrounds, homescreen phones, blog articles, apps, social media, webdesign projects... check this one took by the talented photographer Baher Khairy and shared from his courtesy under CC0.
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)