You might not recognize the seeds in this image as a common food source–rice. Oryza sativa is a staple part of the diet of almost fifty percent of the world’s human population. Needless to say, understanding the genetics of rice is crucial to understanding and protecting this valuable resource.
Rice is a cultigen, a “species” that is the result of human hybridization and selection, i.e., Oryza sativa did not exist prior to human intervention. General consensus is that the wild progenitor of Oryza sativa is Oryza rufipogon (see: history of rice cultivation), though some scientists disagree.
Botany resource link: The Saxifrage Society has an excellent site dedicated to the genus Saxifraga and relatives. The highlight is their database, Saxbase, which you can use to browse through (great) images of many of the plants.