A large collection of royalty-free pictures of flowers is available for download at Public-Domain-Photos.com. The site has more than 400 flower images that can be downloaded and used at no cost to the user.
Royalty-free means the images can be used commercially without having to pay the creator a fee for the use. There are many websites offering royalty-free images of flowers, but this does not mean they are free to download. Most involve at least a small fee. For instance, CanStockPhoto offers over 1,000,000 royalty-free stock photos of flowers, but each download costs $1.
Other websites, such as All-Free-Download.com, allow free downloads, but many of the flower images are specifically marked for educational or non-commercial use only. For commercial projects, the user must contact the artist for permission to use the image without royalties being paid.
The most versatile websites for royalty-free images are ones where the images are free to download and use in a small-resolution format but higher resolution image involve fees. At FreeDigitalPhotos.net, a photo of a passiflora edulis flower is free to download at a resolution of 300 x 400 pixels, but higher resolutions increase in cost up to $10 for the highest resolution available.