Oxalis - Wikipedia
- An account of the genus Oxalis and its uses, with photographs of several species and links to pages covering the more important species in greater detail.
- http://en.wikipedia.org/wiki/Oxalis

Oxalis
- An enthusiast's site with instructions for cultivating different types of Oxalis according to their flowering season, and numerous photographs.
- http://www.simplesite.com/oxalis/3602041

PBSWiki - Oxalis
- Photographs of a wide range of Oxalis species and links to articles on cultivation and taxonomy from the Pacific Bulb Society.
- http://www.pacificbulbsociety.org/pbswiki/index.php/Oxalis